fix: WebSocket 403 — require_active_plugin skips WebSocket requests

Simpler approach: require_active_plugin._check() now accepts Request
parameter and returns early for WebSocket upgrade requests.
No route splitting needed — all routes stay in their original router.

app/main.py

@@ -439,27 +439,17 @@ def create_app() -> FastAPI:
                             # Skip WebSocket routes — the wrapper breaks WS parameter
                             # resolution and returns JSONResponse instead of WS close.
                             from starlette.routing import WebSocketRoute
-                            http_routes = []
-                            ws_routes = []
                             for route in router.routes:
                                 if isinstance(route, WebSocketRoute):
-                                    ws_routes.append(route)
-                                else:
-                                    if hasattr(route, 'endpoint'):
-                                        route.endpoint = wrap_plugin_route(route.endpoint)
-                                    http_routes.append(route)
-                            # Register HTTP routes with active-plugin check
-                            router.routes = http_routes
+                                    continue
+                                if hasattr(route, 'endpoint'):
+                                    route.endpoint = wrap_plugin_route(route.endpoint)
+                            # Add active-plugin check as a router-level dependency
+                            # (require_active_plugin skips WebSocket requests internally)
                             app.include_router(
                                 router,
                                 dependencies=[Depends(require_active_plugin(plugin_name))],
                             )
-                            # Register WebSocket routes WITHOUT active-plugin check
-                            # (WebSocket auth is handled inside the endpoint itself)
-                            if ws_routes:
-                                ws_router = APIRouter()
-                                ws_router.routes = ws_routes
-                                app.include_router(ws_router)
                         except Exception as exc:
                             logger.error(f"Failed to register route {route_def.module}.{route_def.router_attr}: {exc}")
                     break