fix(routers+imports): fix missing DetectionRule import and correct -> list return type annotations that actually return paginated dicts

backend/app/services/elastic_import_service.py

@@ -50,6 +50,7 @@ from sqlalchemy.orm import Session
 
 # Import DataSource from app.models.data_source
 from app.models.data_source import DataSource
+from app.models.detection_rule import DetectionRule
 from app.models.technique import Technique
 from app.services.audit_service import log_action