fix: wrap updateInterval new_interval in timedelta(seconds=) to match SessionConfig type

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

Author: KJonline

src/helper/compat_aliases.py

@@ -7,6 +7,7 @@
 
 from __future__ import annotations
 
+from datetime import timedelta
 from typing import Any
 
 from .hivedataclasses import Device
@@ -140,5 +141,5 @@ async def updateData(self, device: Device):  # pylint: disable=invalid-name
 
     async def updateInterval(self, new_interval: int):  # pylint: disable=invalid-name
         """Backwards-compatible alias for Home Assistant Scan Interval."""
-        self.config.scan_interval = new_interval  # type: ignore[attr-defined]
+        self.config.scan_interval = timedelta(seconds=new_interval)  # type: ignore[attr-defined]
         return True

tests/unit/test_compat_aliases.py

@@ -362,10 +362,12 @@ class TestSessionCompatMixinUpdateInterval:
     """updateInterval must actually update config.scan_interval."""
 
     async def test_update_interval_sets_scan_interval(self):
-        """updateInterval(300) must set self.config.scan_interval = 300."""
+        """updateInterval(300) must set self.config.scan_interval to timedelta(seconds=300)."""
+        from datetime import timedelta
+
         session = _make_concrete_session()
         await session.updateInterval(300)
-        assert session.config.scan_interval == 300
+        assert session.config.scan_interval == timedelta(seconds=300)
 
     async def test_update_interval_returns_true(self):
         """updateInterval must return True on success."""