Refactor account models to use SQLAlchemy 2.0 dataclass mapping (#26415)

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

api/tests/unit_tests/libs/test_helper.py

@@ -11,7 +11,7 @@ class TestExtractTenantId:
     def test_extract_tenant_id_from_account_with_tenant(self):
         """Test extracting tenant_id from Account with current_tenant_id."""
         # Create a mock Account object
-        account = Account()
+        account = Account(name="test", email="test@example.com")
         # Mock the current_tenant_id property
         account._current_tenant = type("MockTenant", (), {"id": "account-tenant-123"})()
 
@@ -21,7 +21,7 @@ class TestExtractTenantId:
     def test_extract_tenant_id_from_account_without_tenant(self):
         """Test extracting tenant_id from Account without current_tenant_id."""
         # Create a mock Account object
-        account = Account()
+        account = Account(name="test", email="test@example.com")
         account._current_tenant = None
 
         tenant_id = extract_tenant_id(account)