Merge branch 'main' into copilot/add-gmail-api-mail-source

backend/app/main.py

@@ -16,6 +16,7 @@ from app.core.security import add_api_key, generate_api_key, require_admin_auth
 from app.middleware.security import SecurityHeadersMiddleware
 from app.models.mail_source import MailSource  # noqa: F401 – ensure table is registered
 from app.services.gmail_client import GmailClient
+from app.models.user import User  # noqa: F401 – ensure User mapper is registered
 from app.services.imap_client import IMAPClient
 from app.services.report_store import ReportStore