fix(campaigns): add missing crud_activate and log_action imports; add style comments to previous import fixes

backend/app/services/caldera_import_service.py

@@ -54,6 +54,7 @@ from sqlalchemy.orm import Session
 # Import DataSource from app.models.data_source
 from app.models.data_source import DataSource
 from app.models.technique import Technique
+# Import TestTemplate from app.models.test_template
 from app.models.test_template import TestTemplate
 from app.services.audit_service import log_action