feat: Stage 4 — fail2ban connection and server status

backend/app/main.py

@@ -33,7 +33,8 @@ from starlette.middleware.base import BaseHTTPMiddleware
 
 from app.config import Settings, get_settings
 from app.db import init_db
-from app.routers import auth, health, setup
+from app.routers import auth, dashboard, health, setup
+from app.tasks import health_check
 
 # ---------------------------------------------------------------------------
 # Ensure the bundled fail2ban package is importable from fail2ban-master/
@@ -114,6 +115,9 @@ async def _lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
     scheduler.start()
     app.state.scheduler = scheduler
 
+    # --- Health-check background probe ---
+    health_check.register(app)
+
     log.info("bangui_started")
 
     try:
@@ -268,5 +272,6 @@ def create_app(settings: Settings | None = None) -> FastAPI:
     app.include_router(health.router)
     app.include_router(setup.router)
     app.include_router(auth.router)
+    app.include_router(dashboard.router)
 
     return app