serve 设为只读模式，禁用外部数据拉取

serve 端不再启动 pull_scheduler 和 financial_scheduler，
阻塞 ext_data 和 financials 的外部获取/同步 API 端点，
数据仅通过 local→serve 同步推送。

Co-Authored-By: Claude <noreply@anthropic.com>

serve/backend/app/api/financials.py

@@ -98,27 +98,8 @@ def get_cash_flow(request: Request, symbol: str | None = None):
 
 @router.post("/sync/{table}")
 def sync_table(request: Request, table: str):
-    """手动触发同步(立即返回,后台异步执行)。
-
-    table: metrics / income / balance_sheet / cash_flow / all
-    同步在后台线程执行,全量同步需数分钟。本接口立即返回 started 状态,
-    前端通过轮询 GET /status 的 syncing 字段观察进度。
-    """
-    capset = request.app.state.capabilities
-    capset.require(Cap.FINANCIAL)
-
-    valid_tables = {"metrics", "income", "balance_sheet", "cash_flow", "all"}
-    if table not in valid_tables:
-        raise HTTPException(400, f"invalid table: {table}, expected one of {valid_tables}")
-
-    fs = getattr(request.app.state, "financial_scheduler", None)
-    if not fs:
-        return {"status": "error", "message": "FinancialScheduler not available"}
-
-    target = None if table == "all" else table
-    result = fs.trigger(target)
-
-    return {"status": "ok", "synced": result}
+    """手动触发同步 — serve 端为只读模式，已禁用。"""
+    raise HTTPException(403, "serve 端为只读模式，数据仅通过 local→serve 同步")
 
 
 class AnalyzeRequest(BaseModel):