[OPIK-4972] [BE] feat: update demo data to only create Opik Demo Agent Observability project

[thiagohora]

Details

Simplifies demo data creation to a single project. Previously, four demo projects were created on signup: Opik Demo Agent Observability, Opik Demo Assistant, Opik Demo Optimizer, and playground. This change removes the three extra projects and keeps only "Opik Demo Agent Observability" as the single demo project.

• Remove create_demo_evaluation_project, create_demo_optimizer_project, and create_demo_playground_project from the Python backend demo data generator
• Clean up all now-unused imports and DemoDataContext dataclass fields
• Update the DEMO_PROJECT_NAME frontend constant to match the single demo project name

DemoData.java (Java backend BI exclusion list) is intentionally kept unchanged for backward compatibility with existing workspaces that already have the old demo projects.

Change checklist

• User facing
• Documentation update

Issues

• OPIK-4972

AI-WATERMARK

AI-WATERMARK: yes

• If yes:
  • Tools: Claude Code
  • Model(s): claude-sonnet-4-6
  • Scope: full implementation
  • Human verification: code review + manual testing

Testing

• pytest tests/ — 69/69 Python backend tests passed
• npm run test — 1254/1254 frontend tests passed (2 pre-existing failures in langchain/mapper.test.ts and openai/mapper.test.ts are unrelated: missing react-h5-audio-player dependency)
• npm run lint — passed cleanly
• Verified DEMO_PROJECT_NAME constant update is reflected in useDemoProject hook

Documentation

N/A

[github-actions]

🔄 Test environment deployment process has started

Phase 1: Deploying base version 1.10.51-4655 (from main branch) if environment doesn't exist
Phase 2: Building new images from PR branch thiaghora/OPIK-4972-update-demo-data-single-project
Phase 3: Will deploy newly built version after build completes

You can monitor the progress here.

[CometActions]

✅ Test environment is now available!

To configure additional Environment variables for your environment, run [Deploy Opik AdHoc Environment workflow] (https://github.com/comet-ml/comet-deployment/actions/workflows/deploy_opik_adhoc_env.yaml)

Access Information

• URL: https://pr-5861.dev.comet.com
• Cluster: comet-ml-development
• Namespace: pr-5861
• Version: 1.10.51-5861-merge-1688
• Application logs: View in Grafana

The deployment has completed successfully and the version has been verified.

[github-actions]

🔄 Test environment deployment process has started

Phase 1: Deploying base version 1.10.51-4655 (from main branch) if environment doesn't exist
Phase 2: Building new images from PR branch thiaghora/OPIK-4972-update-demo-data-single-project
Phase 3: Will deploy newly built version after build completes

You can monitor the progress here.

[CometActions]

✅ Test environment is now available!

To configure additional Environment variables for your environment, run [Deploy Opik AdHoc Environment workflow] (https://github.com/comet-ml/comet-deployment/actions/workflows/deploy_opik_adhoc_env.yaml)

Access Information

• URL: https://pr-5861.dev.comet.com
• Cluster: comet-ml-development
• Namespace: pr-5861
• Version: 1.10.51-5861-merge-1690
• Application logs: View in Grafana

The deployment has completed successfully and the version has been verified.

[aadereiko]

The FE part looks good to go. Just make sure that Demo Project isn't queried from anywhere

[CometActions]

🌙 Nightly cleanup: The test environment for this PR (pr-5861) has been cleaned up to free cluster resources. PVCs are preserved — re-deploy to restore the environment.

[andrescrz]

Please double check the open comment.

[CometActions]

🌙 Nightly cleanup: The test environment for this PR (pr-5861) has been cleaned up to free cluster resources. PVCs are preserved — re-deploy to restore the environment.

[CometActions]

🌙 Nightly cleanup: The test environment for this PR (pr-5861) has been cleaned up to free cluster resources. PVCs are preserved — re-deploy to restore the environment.