Fix trades API 500 by supporting sqlite Row in hold timing.

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

backend/app/api/hold_timing.py

@@ -18,10 +18,20 @@ def _ts(v: Any) -> int | None:
     return n if n > 0 else None
 
 
-def first_perp_close_ts_ms(fills: Sequence[Mapping[str, Any]]) -> int | None:
+def _as_map(row: Mapping[str, Any] | Any) -> Mapping[str, Any]:
+    if isinstance(row, Mapping):
+        return row
+    try:
+        return dict(row)
+    except Exception:
+        return {}
+
+
+def first_perp_close_ts_ms(fills: Sequence[Mapping[str, Any] | Any]) -> int | None:
     """永续平仓成交时间（目标只平永续时作为持仓结束时刻）。"""
     best: int | None = None
-    for f in fills:
+    for raw in fills:
+        f = _as_map(raw)
         if str(f.get("leg") or "") != "perp":
             continue
         if str(f.get("action") or "") != "close":
@@ -35,7 +45,7 @@ def first_perp_close_ts_ms(fills: Sequence[Mapping[str, Any]]) -> int | None:
 
 
 def hold_timing(
-    group: Mapping[str, Any], fills: Sequence[Mapping[str, Any]]
+    group: Mapping[str, Any] | Any, fills: Sequence[Mapping[str, Any] | Any]
 ) -> dict[str, Any]:
     """
     返回展示用开仓/平仓/持仓时长。
@@ -45,10 +55,11 @@ def hold_timing(
       - `target_perp_only` / `option_residual`：永续平仓 fill 时间
       - 其它已平：groups.close_at_ms（缺则回退成交）
     """
-    open_ms = _ts(group.get("open_at_ms"))
-    status = str(group.get("status") or "")
-    reason = str(group.get("close_reason") or "")
-    group_close = _ts(group.get("close_at_ms"))
+    g = _as_map(group)
+    open_ms = _ts(g.get("open_at_ms"))
+    status = str(g.get("status") or "")
+    reason = str(g.get("close_reason") or "")
+    group_close = _ts(g.get("close_at_ms"))
     perp_close = first_perp_close_ts_ms(fills)
 
     use_perp = reason == "target_perp_only" or status == "option_residual"