fix(tests): mock get_setting in calendar tools availability test

The rss_enabled check in _check_requires now calls get_setting, which
needs a database connection. Mock it in the test that exercises
get_tools_for_user.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/test_events_service.py

@@ -127,8 +127,10 @@ async def test_update_event_fires_caldav_push():
 @pytest.mark.asyncio
 async def test_tools_calendar_always_available():
     """Calendar tools must appear in get_tools_for_user even without CalDAV."""
-    with patch("fabledassistant.services.tools._registry.is_caldav_configured", new_callable=AsyncMock) as mock_configured:
+    with patch("fabledassistant.services.tools._registry.is_caldav_configured", new_callable=AsyncMock) as mock_configured, \
+         patch("fabledassistant.services.tools._registry.get_setting", new_callable=AsyncMock) as mock_setting:
         mock_configured.return_value = False
+        mock_setting.return_value = "false"
         from fabledassistant.services.tools import get_tools_for_user
         tools = await get_tools_for_user(user_id=1)
         tool_names = {t["function"]["name"] for t in tools}