Fix: Add missing model imports in /api/reports/last-sync endpoint

- Add Bet, ExtractionStats, and MatchReport model imports to api_get_last_sync function
- Fixes 'name Bet is not defined' error when querying last sync status

app/api/routes.py

@@ -1436,7 +1436,7 @@ def api_reports_sync():
 def api_get_last_sync():
     """Get last sync information for a client - allows client to verify server state"""
     try:
-        from app.models import ReportSync, ReportSyncLog, APIToken, ClientActivity
+        from app.models import ReportSync, ReportSyncLog, APIToken, ClientActivity, Bet, ExtractionStats, MatchReport
         from app.auth.jwt_utils import validate_api_token, extract_token_from_request
         from sqlalchemy import desc