Health and discovery

Liveness checks and machine-readable descriptions of the API.

Method	Path	Summary
GET	/onehazel-api/feature-flags	List feature flags
GET	/onehazel-api/health	Check API health
GET	/onehazel-api/openapi.json	Redirect to the OpenAPI document (JSON)
GET	/onehazel-api/openapi.yaml	Redirect to the OpenAPI document
GET	/onehazel-api/public/connectors	List public catalogue connectors