chore: use new model runner syntax

[lionello]

Cf. https://docs.docker.com/ai/compose/models-and-compose/

Samples Checklist

• ./samples/agentic-autogen/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/agentic-langgraph/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/agentic-strands/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/angular-express/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/arduino-wifi/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/bullmq-bullboard-redis/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  ! service "redisx": Managed redis is not supported in the Playground; consider using BYOC (https://s.defang.io/byoc)
  Error: missing bearer token
• ./samples/crew-django-redis-postgres/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  ! service "postgres": managed postgres is not supported in the Playground; consider using BYOC (https://s.defang.io/byoc)
  ! service "redis": Managed redis is not supported in the Playground; consider using BYOC (https://s.defang.io/byoc)
  Error: missing bearer token
• ./samples/csharp-dotnet/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/django-celery/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  ! service "broker": Managed redis is not supported in the Playground; consider using BYOC (https://s.defang.io/byoc)
  ! service "database": managed postgres is not supported in the Playground; consider using BYOC (https://s.defang.io/byoc)
  Error: missing bearer token
• ./samples/django-channels-redis-postgres/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/django-postgres/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  ! service "db": managed postgres is not supported in the Playground; consider using BYOC (https://s.defang.io/byoc)
  Error: missing bearer token
• ./samples/django-railpack/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/django/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/elysia/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/fastapi-postgres-pubsub/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  ! service "postgres": managed postgres is not supported in the Playground; consider using BYOC (https://s.defang.io/byoc)
  Error: missing bearer token
• ./samples/fastapi-postgres/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/fastapi/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/feathersjs/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/flask-railpack/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/flask/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/golang-http-form-railpack/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/golang-http-form/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/golang-http/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/golang-mongodb/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  ! service "db": managed mongodb is not supported in the Playground; consider using BYOC (https://s.defang.io/byoc)
  Error: missing bearer token
• ./samples/golang-openai/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/golang-rest-api/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/golang-s3/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/golang-slackbot/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/google-adk/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/hasura/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  ! service "database": managed postgres is not supported in the Playground; consider using BYOC (https://s.defang.io/byoc)
  Error: missing bearer token
• ./samples/html-css-js/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/huginn/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/imgproxy/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/javalin/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/jupyter-postgres/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  ! service "db": managed postgres is not supported in the Playground; consider using BYOC (https://s.defang.io/byoc)
  Error: missing bearer token
• ./samples/langchain/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/managed-llm-provider/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/managed-llm/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/mastra-nextjs/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  ! service "database": managed postgres is not supported in the Playground; consider using BYOC (https://s.defang.io/byoc)
  Error: missing bearer token
• ./samples/mcp/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/metabase/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/n8n/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  ! service "postgres": managed postgres is not supported in the Playground; consider using BYOC (https://s.defang.io/byoc)
  Error: missing bearer token
• ./samples/nextjs-blog/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/nextjs-claude/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/nextjs-cv/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/nextjs-documentation/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/nextjs-postgres/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  ! service "database": managed postgres is not supported in the Playground; consider using BYOC (https://s.defang.io/byoc)
  Error: missing bearer token
• ./samples/nextjs-railpack/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/nextjs/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/nocodb/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/nodejs-chatroom/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/nodejs-express/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/nodejs-form/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/nodejs-http/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/nodejs-openai/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/nodejs-react-postgres/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/nodejs-rest-api/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/nodejs-s3/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/nounly/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  ! service "redis": Managed redis is not supported in the Playground; consider using BYOC (https://s.defang.io/byoc)
  Error: missing bearer token
• ./samples/ollama/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/phoenix-postgres/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/platformatic/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/python-form/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/python-implicit-gpu/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/python-minimal/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/python-openai/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/python-rest-api/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/python-s3/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/rails/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  ! service "db": managed postgres is not supported in the Playground; consider using BYOC (https://s.defang.io/byoc)
  Error: missing bearer token
• ./samples/react-vite-railpack/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/react/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/redis-js/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  ! service "redisx": Managed redis is not supported in the Playground; consider using BYOC (https://s.defang.io/byoc)
  Error: missing bearer token
• ./samples/rocket/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/sailsjs-postgres/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/sailsjs/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/svelte-mysql/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/sveltekit-mongodb/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  ! service "mongo": managed mongodb is not supported in the Playground; consider using BYOC (https://s.defang.io/byoc)
  Error: missing bearer token
• ./samples/sveltekit/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/vllm/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token
• ./samples/vuejs/compose.yaml is not valid according to defang compose config: * Using Defang Playground provider from default project
  Error: missing bearer token