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>

lib/options/options_hub_lib.py

@@ -22,7 +22,8 @@ def build_options_hub_snapshot(cfg: dict[str, Any]) -> dict[str, Any]:
         raw = cfg["fetch_option_positions"](ex)
         if raw is None:
             return {"ok": False, "enabled": True, "msg": "获取期权持仓失败"}
-        positions = build_display_option_positions(cfg, ex, raw)
+        # 中控看板不拉逐仓 books(易超 HUB_FLASK_TIMEOUT);实例页仍走完整 preview
+        positions = build_display_option_positions(cfg, ex, raw, with_close_preview=False)
         target_monitors: list[dict[str, Any]] = []
         try:
             conn = cfg["get_db"]()