feat: 添加 API 路由（公告/爬取/微信回调/调度器）+ 健康检查测试

app/main.py

@@ -20,7 +20,10 @@ async def lifespan(app: FastAPI):
         level=getattr(logging, settings.log_level),
         format="%(asctime)s [%(levelname)s] %(name)s: %(message)s",
     )
+    from app.scheduler.jobs import start_scheduler, shutdown_scheduler
+    start_scheduler()
     yield
+    shutdown_scheduler()
     await engine.dispose()
 
 
@@ -32,6 +35,9 @@ app = FastAPI(
     redoc_url=None,
 )
 
+from app.api.router import api_router
+app.include_router(api_router)
+
 
 @app.get("/health")
 async def health():