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

app/api/deps.py

@@ -0,0 +1,22 @@
+from sqlalchemy.ext.asyncio import AsyncSession
+from app.services.crawl_service import CrawlService
+from app.crawler.gxgp_spider import GXGPSpider
+from app.crawler.dahuagov_spider import DahuagovSpider
+
+
+async def get_db() -> AsyncSession:
+    from app.main import async_session  # 延迟导入避免循环引用
+    async with async_session() as session:
+        yield session
+
+
+_crawl_service: CrawlService | None = None
+
+
+def get_crawl_service() -> CrawlService:
+    global _crawl_service
+    if _crawl_service is None:
+        _crawl_service = CrawlService()
+        _crawl_service.register(GXGPSpider())
+        _crawl_service.register(DahuagovSpider())
+    return _crawl_service