fix(insta-render): BLMOVE dequeue가 짧은 socket_timeout으로 깨지던 문제 해결

REDIS_URL의 socket_timeout(<5s)이 ReliableQueue BLMOVE 5초 블록보다 짧아
idle dequeue마다 "Timeout reading"으로 잡을 못 꺼내 슬레이트가 draft에 정지(~2026-05-22~).
큐 연결을 socket_timeout=None + socket_keepalive로 생성(make_queue_redis)해 정상화.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

services/insta-render/tests/test_worker.py

@@ -222,3 +222,14 @@ async def test_poll_once_returns_false_on_timeout(monkeypatch):
     process_mock.assert_not_awaited()
     fake_queue.ack.assert_not_awaited()
     fake_queue.fail.assert_not_awaited()
+
+
+def test_make_queue_redis_no_read_timeout():
+    """BLMOVE(블록 5s) dequeue가 read-timeout으로 깨지지 않도록 socket_timeout=None 보장 (회귀 가드)."""
+    import os, sys
+    _here = os.path.dirname(os.path.abspath(__file__))
+    sys.path.insert(0, os.path.dirname(_here))                      # services/insta-render
+    sys.path.insert(0, os.path.dirname(os.path.dirname(_here)))     # services (_shared)
+    import worker
+    c = worker.make_queue_redis()
+    assert c.connection_pool.connection_kwargs.get("socket_timeout") is None

services/insta-render/worker.py

@@ -98,9 +98,23 @@ async def poll_once(queue: ReliableQueue, client: httpx.AsyncClient) -> bool:
     return True
 
 
+def make_queue_redis():
+    """블로킹 dequeue(BLMOVE 5s)용 redis 클라이언트.
+
+    BLMOVE 블록보다 짧은 socket_timeout(예: REDIS_URL ?socket_timeout=)이 걸려 있으면
+    idle 폴링마다 "Timeout reading"으로 dequeue가 실패해 잡을 영영 못 꺼낸다(슬레이트 draft 정지).
+    → read-timeout을 두지 않는다(socket_timeout=None). 죽은 연결은 socket_keepalive +
+      worker_loop 재시도로 감지/복구. (explicit kwarg가 URL의 socket_timeout을 override)
+    """
+    return aioredis.from_url(
+        REDIS_URL, decode_responses=False,
+        socket_timeout=None, socket_keepalive=True,
+    )
+
+
 async def worker_loop():
     """무한 루프 — paused 체크 → ReliableQueue.dequeue → process_one → ack/fail."""
-    redis = aioredis.from_url(REDIS_URL, decode_responses=False)
+    redis = make_queue_redis()
     queue = ReliableQueue(redis, queue_key=QUEUE_KEY)
     async with httpx.AsyncClient() as client:
         logger.info("insta-render worker started worker_id=%s queue=%s",