perf: website_sync 批量查询 + custom_pages origin TTL 缓存

backend/app/services/website_sync.py

@@ -96,13 +96,27 @@ def sync_binding(db: Session, binding: WebsiteGroupBinding, write: bool = True)
     if not website:
         raise WebsiteError("网站不存在")
     sources = binding_sources(binding)
+    # ── 批量预查：收集所有上游 ID，一次查询上游名称 ──
+    upstream_ids = {int(s.get("upstream_id") or 0) for s in sources if s.get("upstream_id")}
+    upstreams = {}
+    if upstream_ids:
+        rows = db.query(Upstream).filter(Upstream.id.in_(upstream_ids)).all()
+        upstreams = {u.id: u for u in rows}
+    # ── 同一轮 sync 内的快照缓存（调用级，函数返回即释放）──
+    _snap_cache: dict[int, dict[str, Any]] = {}
+
+    def _get_snap(upstream_id: int) -> dict[str, Any]:
+        if upstream_id not in _snap_cache:
+            _snap_cache[upstream_id] = latest_rate_map(db, upstream_id)
+        return _snap_cache[upstream_id]
+
     source_rates: list[dict[str, Any]] = []
     for source in sources:
         upstream_id = int(source.get("upstream_id") or 0)
         group_id = str(source.get("group_id") or "")
-        groups = latest_rate_map(db, upstream_id)
+        groups = _get_snap(upstream_id)
         group = groups.get(group_id) if group_id else None
-        upstream = db.query(Upstream).filter(Upstream.id == upstream_id).first()
+        upstream = upstreams.get(upstream_id)
         source_rates.append({
             "upstream_id": upstream_id,
             "upstream_name": source.get("upstream_name") or (upstream.name if upstream else ""),