Engine manages route groups and builds a Gin-based HTTP handler.
New() accepts functional options (WithAddr). Handler() builds a fresh
Gin engine with Recovery middleware and /health endpoint. Serve()
starts the server and performs graceful shutdown on context cancellation.
Co-Authored-By: Virgil <virgil@lethean.io>
RouteGroup declares Name, BasePath, and RegisterRoutes for subsystems
to mount their endpoints onto a Gin router group. StreamGroup optionally
declares WebSocket channel names. Gin v1.11.0 added as dependency.
Co-Authored-By: Virgil <virgil@lethean.io>
Generic Response[T] envelope with Success, Data, Error, and Meta fields.
Includes OK, Fail, FailWithDetails, and Paginated constructor functions.
JSON marshalling correctly omits empty fields via omitempty tags.
Co-Authored-By: Virgil <virgil@lethean.io>
