fix(hub): restore pre-WS quote path and relieve Gate/account contention

Two audit rounds after WS rollback: lighten hub options snapshot, cache hub balances without extra fetch_balance, soft-poll single-flight, and document fixes in R1/R2 reports.

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

manual_trading_hub/hub.py

@@ -2028,7 +2028,8 @@ async def _fetch_flask_json(
             return parsed
         return _parse_http_json_body(r)
     except Exception as e:
-        return {"ok": False, "error": str(e)}
+        err = str(e)
+        return {"ok": False, "error": err, "msg": err}
 
 
 async def _notify_instance_user_close(
@@ -2567,8 +2568,8 @@ def _merge_flask_exchange_tpsl(agent_row: dict, snap: dict | None, hub_mon: dict
 
 async def _fetch_exchange_flask_bundle(
     client: httpx.AsyncClient, ex: dict, *, trading_day: str | None = None
-) -> tuple[dict | None, dict | None, list | None, dict | None, dict | None, dict | None]:
-    """单所 Flask:monitor / meta / price_snapshot / account / trades/today(有 flask_url 时)并行拉取."""
+) -> tuple:
+    """单所 Flask:monitor / meta / price_snapshot / account / trades/today / options 并行拉取."""
     caps = ex.get("capabilities") or []
     tasks = [
         _fetch_flask_json(client, ex, "/api/hub/monitor"),
@@ -2576,6 +2577,7 @@ async def _fetch_exchange_flask_bundle(
     ]
     has_flask = bool((ex.get("flask_url") or "").strip())
     day = (trading_day or "").strip()
+    want_options = has_flask and "options" in caps
     if has_flask:
         tasks.extend(
             [
@@ -2592,15 +2594,26 @@ async def _fetch_exchange_flask_bundle(
                     params={"trading_day": day},
                 )
             )
+        if want_options:
+            tasks.append(_fetch_flask_json(client, ex, "/api/hub/options/snapshot"))
     results = await asyncio.gather(*tasks)
     hub_mon = results[0]
     meta = results[1]
-    snap = results[2] if has_flask and len(results) > 2 else None
-    account = results[3] if has_flask and len(results) > 3 else None
-    trades_today = results[4] if has_flask and day and len(results) > 4 else None
+    idx = 2
+    snap = None
+    account = None
+    trades_today = None
     options_snap = None
-    if has_flask and "options" in caps:
-        options_snap = await _fetch_flask_json(client, ex, "/api/hub/options/snapshot")
+    if has_flask:
+        snap = results[idx]
+        idx += 1
+        account = results[idx]
+        idx += 1
+        if day:
+            trades_today = results[idx]
+            idx += 1
+        if want_options:
+            options_snap = results[idx]
     key_prices = None
     want_prices = HUB_BOARD_KEY_PRICES and "key" in caps
     if want_prices and isinstance(snap, dict):