Move health endpoint from OpenAPI spec to direct implementation
* Move health endpoint from OpenAPI spec to direct implementation
- Removed HealthService tag from OpenAPI spec
- Removed /health path from OpenAPI spec
- Removed health.go and health_test.go files from api/queryAPI
- Added direct health endpoint in internal/server/api/listener.go
- Updated validator options to skip validation for the /health endpoint
- Added test for health endpoint in internal/server/api/listener_test.go
- Regenerated API code from the updated OpenAPI spec