Implement automated apollo-mcp-server schema sync

[gocamille]

Problem

The local mcp-server.schema.json in the add-mcp template was outdated:

• Using JSON Schema draft-07 (official apollo-mcp-server uses draft-2020-12)
• Only 168 lines vs official 1045 lines
• Missing critical fields: headers, graphos, telemetry, health_check, forward_headers, custom_scalars
• Template YAML files showed false positive validation errors

Solution

Implemented automated schema synchronization from Apollo MCP Server releases:

1. Automated Workflows

• Daily sync workflow - Checks for new releases from https://github.com/apollographql/apollo-mcp-server, checks for updates to the schema, and creates PRs when applicable
• CI validation - Validates template YAML files against official schema on every PR

2. Schema Upgrade

• Replaced local schema with official apollo-mcp-server v1.3.0 schema
• Upgraded from draft-07 to draft-2020-12
• Now includes all official config options

3. Template Cleanup

• Removed invalid require_confirmation field (doesn't exist in apollo-mcp-server)
• This field was being silently ignored at runtime

4. Process Documentation

• Updated schemas README with sync process
• Added VERSION tracking file
• Updated CODEOWNERS for @gocamille review when a PR is generated

Testing

• Schema validates correctly with ajv-cli
• Template YAML files pass validation
• VS Code autocomplete works for all official fields
• No false positive errors on valid config

Breaking Changes

None - only removes invalid config that was already being ignored.