[WIP] Update Schemathesis API Testing to wait for health endpoint

[Copilot]

Update Schemathesis API Testing to wait for health endpoint

Analysis shows current state and required changes:

Current Health Check Status:

• Kotlin: Already uses /health endpoint correctly in CI ✅
• Java: Uses /v1/lamps endpoint instead of /health
• TypeScript: Uses /v1/lamps endpoint instead of /health
• C#: Uses /swagger/v1/swagger.json endpoint instead of /health
• Go: Uses /lamps endpoint instead of /health
• Python: Uses /v1/lamps endpoint instead of /health
• PHP: No Schemathesis integration at all

Implementation Plan:

• Add /health endpoints to implementations that don't have them
• Update CI workflows to use /health endpoint for readiness checks
• Add Schemathesis integration to PHP implementation
• Update documentation to describe health check mechanism
• Verify all implementations work with health endpoint checks

Next Steps:

• Check which implementations already have health endpoints
• Add missing health endpoints where needed
• Update CI workflow files to use /health consistently
• Update local scripts if any exist
• Update documentation

Fixes #170.

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.