fix(bridge): 429 Rate Limit 무한 루프 방지 — 지수 백오프 + Collector 폴링 보호 + rate limit 완화

gateway.py

@@ -28,7 +28,7 @@ logger = logging.getLogger(__name__)
 
 # Rate limiting
 RATE_LIMIT_WINDOW = 1.0   # seconds
-RATE_LIMIT_MAX = 10       # max requests per window per IP
+RATE_LIMIT_MAX = 30       # max requests per window per IP (Collector needs ~15-20/cycle)
 COMMAND_TTL = 1800        # 30 min — stale commands auto-deleted
 
 
@@ -89,6 +89,7 @@ class GatewayAPI:
                 return web.json_response(
                     {"error": "Too Many Requests"},
                     status=429,
+                    headers={"Retry-After": str(int(RATE_LIMIT_WINDOW * 2))},
                 )
             window.append(now)
             self._rate_limits[ip] = window