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_positions_lib.py

@@ -145,8 +145,10 @@ def build_display_option_positions(
     cfg: dict[str, Any],
     ex: Any,
     raw_positions: list[dict[str, Any]],
+    *,
+    with_close_preview: bool = True,
 ) -> list[dict[str, Any]]:
-    """与实例 /api/options/positions 相同 enrichment + close_preview."""
+    """与实例 /api/options/positions 相同 enrichment;中控可关 close_preview 避免逐仓拉盘口超时."""
     meta_cache: dict[str, dict[str, Any] | None] = {}
     rows: list[dict[str, Any]] = []
     conn = cfg["get_db"]()
@@ -162,7 +164,8 @@ def build_display_option_positions(
                 meta_cache=meta_cache,
                 premium_override=premium_override,
             )
-            attach_close_preview(cfg, ex, row, premium_paid=_safe_float(row.get("premium_paid")))
+            if with_close_preview:
+                attach_close_preview(cfg, ex, row, premium_paid=_safe_float(row.get("premium_paid")))
             rows.append(row)
     finally:
         conn.close()