This pull request refactors the health check endpoint implementation by moving it from the OAuth endpoint manager to the main server service. The health endpoint is now always available, independent of OAuth configuration, and its response has been expanded to include additional fields. Corresponding tests and endpoint documentation have been updated to reflect these changes.

Health Endpoint Refactor:

• The /health endpoint and its handler have been removed from EndpointManager in internal/auth/oauth/endpoints.go, and all related tests have been deleted or updated. [1] [2] [3] [4] [5]
• A new healthHandler is implemented in Service (internal/server/server.go), making the health endpoint always available regardless of OAuth configuration. The handler now returns additional fields: version and transport alongside status and OAuth info.

Server Routing and Documentation Updates:

• The /health endpoint is registered in both HTTP and SSE servers, and routing logic is updated so /health is always handled and documented in 404 responses. Endpoint descriptions are updated to include /health. [1] [2] [3] [4] [5] [6] [7]

Test Updates:

• Tests for the HTTP and SSE servers are updated to expect the /health endpoint to return a healthy status and the new response format, including checks for version, transport, and OAuth fields. [1] [2] [3] [4] [5] [6]