rebuild(stage-2): establish runtime and persistence foundations

next/backend/http/routes/health.py

@@ -7,11 +7,17 @@ router = APIRouter(tags=["health"])
 class HealthResponse(BaseModel):
     status: str
     environment: str
+    components: dict[str, str]
 
 
 @router.get("/health", response_model=HealthResponse)
 def health(request: Request) -> HealthResponse:
+    database_status = request.app.state.container.database_status.get()
     return HealthResponse(
-        status="ok",
+        status="ok" if database_status.available else "degraded",
         environment=request.app.state.settings.environment,
+        components={
+            "process": "ok",
+            "database": "ok" if database_status.available else "unavailable",
+        },
     )