fix: Fix missing imports in teams_service.py for autoTriage (#184)

* fix: Fix missing imports in teams_service.py for autoTriage

The teams_service.py was importing DailyDigestResult and WeeklyPlanResult
models that don't exist in the autoTriage directory (they're part of the
larger TeamAssistant backend). These imports were causing the auto-triage
workflow to fail with ModuleNotFoundError.

Solution:
- Added `from __future__ import annotations` to make all type hints strings
- Made imports conditional using TYPE_CHECKING
- Type hints now work for development but don't fail at runtime
- Auto-triage workflow can now import services without errors

The Teams notification features (daily digest, weekly summary) are not
used by the auto-triage workflow, so these optional imports don't affect
functionality.

Fixes the workflow error:
  ModuleNotFoundError: No module named 'models.daily_digest'

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

* fix: Remove unused Any import from teams_service.py

---------

Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: mengyimicro

autoTriage/services/teams_service.py

@@ -4,13 +4,18 @@
 """
 Teams Service - Microsoft Teams webhook integration
 """
+from __future__ import annotations
+
 import os
 import json
 import logging
 import requests
-from typing import Any
-from models.daily_digest import DailyDigestResult
-from models.weekly_plan import WeeklyPlanResult
+from typing import TYPE_CHECKING
+
+# Conditional imports for type hints only (these models don't exist in autoTriage)
+if TYPE_CHECKING:
+    from models.daily_digest import DailyDigestResult
+    from models.weekly_plan import WeeklyPlanResult
 
 
 class TeamsService: