Harden scheduler and stale breakout reentry

app/execution/kis_client.py

@@ -55,9 +55,17 @@ class KISClient:
         )
         self._load_token_from_file()
 
-        # rate limit: 모의투자 1건/초보다 보수적, 실거래 5건/초 이하
-        self._rate_limit = 1 if self.is_mock else 5
-        self._request_spacing = 1.2 if self.is_mock else 0.22
+        # rate limit: KIS occasionally rejects even nominally safe bursts.
+        # Keep defaults conservative and allow local override from .env.
+        self._rate_limit = int(os.getenv(
+            "KIS_MOCK_RATE_LIMIT" if self.is_mock else "KIS_REAL_RATE_LIMIT",
+            "1" if self.is_mock else "3",
+        ))
+        self._request_spacing = float(os.getenv(
+            "KIS_MOCK_REQUEST_SPACING" if self.is_mock else "KIS_REAL_REQUEST_SPACING",
+            "1.7" if self.is_mock else "0.35",
+        ))
+        self._cooldown_until = 0.0
         self._semaphore  = asyncio.Semaphore(1)
         self._req_times  : list = []
 
@@ -175,6 +183,9 @@ class KISClient:
 
         async with self._semaphore:
             now = time.monotonic()
+            if now < self._cooldown_until:
+                await asyncio.sleep(self._cooldown_until - now)
+                now = time.monotonic()
             if self._req_times:
                 wait = self._request_spacing - (now - self._req_times[-1])
                 if wait > 0:
@@ -204,6 +215,8 @@ class KISClient:
         rt_cd = data.get("rt_cd", "")
         if rt_cd != "0":
             msg = data.get("msg1", "알 수 없는 오류")
+            if "초당" in msg or "거래건수" in msg or "rate" in msg.lower():
+                self._cooldown_until = time.monotonic() + max(2.5, self._request_spacing * 2)
             logger.error(f"KIS API 오류 [{tr_id}]: {rt_cd} - {msg}")
             raise RuntimeError(f"KIS API 오류: {msg}")