Add Binance live trading, anti-stuck open/close recovery, and configurable rate limits.

OKX/Binance LIVE share half_open and option_closed_perp_pending repair paths; private REST throttles default to 1s and are tunable in settings.

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

backend/app/api/settings.py

@@ -33,6 +33,7 @@ KEYS = (
     "net_profit_target",
     "premium_exit_multiple",
     "rest_seconds",
+    "live_order_interval_sec",
     "skip_weekends",
     "initial_equity",
     "leverage",
@@ -53,6 +54,7 @@ class StrategySettingsBody(BaseModel):
     net_profit_target: float | None = Field(default=None, ge=0.1, le=1_000_000)
     premium_exit_multiple: float | None = Field(default=None, ge=0.1, le=100)
     rest_seconds: int | None = Field(default=None, ge=0, le=3600)
+    live_order_interval_sec: float | None = Field(default=None, ge=0.2, le=30)
     skip_weekends: bool | None = None
     initial_equity: float | None = Field(default=None, ge=1000, le=10_000_000)
     leverage: float | None = Field(default=None, ge=1, le=125)
@@ -96,6 +98,12 @@ def _read_settings() -> dict:
         "rest_seconds": int(
             float(db.get_setting("rest_seconds", str(s.rest_seconds)) or s.rest_seconds)
         ),
+        "live_order_interval_sec": float(
+            db.get_setting(
+                "live_order_interval_sec", str(s.live_order_interval_sec)
+            )
+            or s.live_order_interval_sec
+        ),
         "skip_weekends": _as_bool(
             db.get_setting("skip_weekends", str(s.skip_weekends)), s.skip_weekends
         ),