refactor(status): consolidate status_service to delegate to TechniqueEntity.recalculate_status() eliminating duplicated business logic

backend/app/domain/entities/technique.py

@@ -79,11 +79,12 @@ class TechniqueEntity:
     def from_orm(cls, model: Any) -> TechniqueEntity:
         """Build a TechniqueEntity from a SQLAlchemy Technique model."""
         raw_status = model.status_global
-        status = (
-            raw_status
-            if isinstance(raw_status, TechniqueStatus)
-            else TechniqueStatus(raw_status)
-        )
+        if raw_status is None:
+            status = TechniqueStatus.not_evaluated
+        elif isinstance(raw_status, TechniqueStatus):
+            status = raw_status
+        else:
+            status = TechniqueStatus(raw_status)
         return cls(
             id=model.id,
             mitre_id=model.mitre_id,