feat: 屏蔽接口3(B端生发)

网关层直接拦截返回 1007，不再转发到 worker 池；worker 侧路由同步标记
deprecated 并短路返回，保留原参数签名避免老客户端裸 404。

Co-authored-by: Cursor <cursoragent@cursor.com>

gateway/app.py

@@ -539,10 +539,15 @@ async def hair_grow(request: Request):
     return await _proxy(request, "/api/v1/hair/grow")
 
 
-@app.post("/api/v1/hair/grow-b", tags=["生发"])
+@app.post("/api/v1/hair/grow-b", tags=["生发"], deprecated=True)
 async def hair_grow_b(request: Request):
-    """接口3：B端生发"""
-    return await _proxy(request, "/api/v1/hair/grow-b")
+    """接口3：B端生发（已屏蔽）"""
+    # 在网关层直接拦截，不转发到 worker 池——对所有上游 worker 立即生效。
+    import uuid as _uuid
+    return JSONResponse(status_code=200, content={
+        "code": 1007, "message": "接口3（/api/v1/hair/grow-b）已屏蔽，暂不提供服务",
+        "request_id": f"gw-{_uuid.uuid4().hex[:8]}", "data": None,
+    })
 
 
 @app.post("/api/v1/face/features", tags=["人脸分析"])