feat(api): implement API key management and authentication enhancements

- Added endpoints for managing API keys, including creation, retrieval, updating, and revocation.
- Introduced a new Auth session endpoint to retrieve current tenant and role information.
- Updated the authentication middleware to support API key-based authentication and track last used timestamps.
- Enhanced documentation to reflect new API key functionalities and usage guidelines.
- Improved logging for demo authentication scenarios.

internal/httpapi/routes_crud.go

@@ -70,6 +70,8 @@ func (s *Server) registerCRUDRoutes(m *http.ServeMux) {
 
 	m.HandleFunc("GET /settings", s.handleGetSettings)
 	m.HandleFunc("PATCH /settings", s.handlePatchSettings)
+
+	s.registerAPIKeyRoutes(m)
 }
 
 func (s *Server) handlePostModule(w http.ResponseWriter, r *http.Request) {