fix: 添加健康检查端点和 Secrets 验证步骤

app/backend.py

@@ -54,6 +54,13 @@ app.add_middleware(
 )
 
 
+# ========== 健康检查端点 ==========
+@app.get("/health")
+async def health_check():
+    """健康检查端点，用于 Docker 和 CI/CD 监控"""
+    return {"status": "ok", "service": "ai-agent-backend"}
+
+
 # ========== Pydantic 模型 ==========
 class ChatRequest(BaseModel):
     message: str