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/tests/test_runtime_mode.py

@@ -49,22 +49,22 @@ def test_live_ready_okx_missing_keys(monkeypatch) -> None:
     assert "OKX" in reason
 
 
-def test_live_ready_binance_stub(monkeypatch) -> None:
+def test_live_ready_binance_ok(monkeypatch) -> None:
     import app.env_store as es
 
     class S:
         mode = "LIVE"
         is_sim = False
-        okx_api_key = "k"
-        okx_api_secret = "s"
-        okx_api_passphrase = "p"
+        okx_api_key = ""
+        okx_api_secret = ""
+        okx_api_passphrase = ""
         binance_api_key = "bk"
         binance_api_secret = "bs"
 
     monkeypatch.setattr(es, "get_settings", lambda: S())
     ok, reason = live_ready(exchange="binance")
-    assert ok is False
-    assert "尚未接入" in reason
+    assert ok is True
+    assert reason == "ok"
 
 
 def test_okx_keys_configured(monkeypatch) -> None: