fix(agent): stabilize live e2e tool execution and loop isolation

backend/tests/unit/services/base/test_redis_service.py

@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+import asyncio
+
 import pytest
 
 from core.config.settings import RedisSettings
@@ -107,7 +109,9 @@ async def test_get_or_init_redis_client_initializes_when_needed(
     async def _fake_initialize() -> bool:
         return True
 
-    monkeypatch.setattr(type(redis_service), "is_initialized", property(lambda _: False))
+    monkeypatch.setattr(
+        type(redis_service), "is_initialized", property(lambda _: False)
+    )
     monkeypatch.setattr(redis_service, "initialize", _fake_initialize)
     monkeypatch.setattr(redis_service, "get_client", lambda: fake_client)
 
@@ -123,8 +127,40 @@ async def test_get_or_init_redis_client_raises_when_init_fails(
     async def _fake_initialize() -> bool:
         return False
 
-    monkeypatch.setattr(type(redis_service), "is_initialized", property(lambda _: False))
+    monkeypatch.setattr(
+        type(redis_service), "is_initialized", property(lambda _: False)
+    )
     monkeypatch.setattr(redis_service, "initialize", _fake_initialize)
 
     with pytest.raises(RuntimeError, match="Redis service initialization failed"):
         await get_or_init_redis_client()
+
+
+@pytest.mark.asyncio
+async def test_get_or_init_redis_client_reinitializes_when_event_loop_changes(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    stale_client = _FakeRedisClient()
+    fresh_client = _FakeRedisClient()
+    call_count = {"initialize": 0}
+
+    async def _fake_initialize() -> bool:
+        call_count["initialize"] += 1
+        return True
+
+    class _Loop:
+        pass
+
+    loop_obj = _Loop()
+
+    monkeypatch.setattr(asyncio, "get_running_loop", lambda: loop_obj)
+    monkeypatch.setattr(redis_service, "initialize", _fake_initialize)
+    monkeypatch.setattr(redis_service, "get_client", lambda: fresh_client)
+    monkeypatch.setattr(redis_service, "_client", stale_client, raising=False)
+    monkeypatch.setattr(redis_service, "_loop_id", 123, raising=False)
+    monkeypatch.setattr(redis_service, "_initialized", True, raising=False)
+
+    client = await get_or_init_redis_client()
+
+    assert call_count["initialize"] == 1
+    assert client is fresh_client