Add ReviewEvent model and ReviewSubmissionService for review management

- Created a new ReviewEvent model to track review events with fields for content, rating, moderation status, and timestamps.
- Added ForeignKey relationships to connect ReviewEvent with ContentSubmission, User, and Review.
- Implemented ReviewSubmissionService to handle review submissions, including creation, updates, and moderation workflows.
- Introduced atomic transactions to ensure data integrity during review submissions and updates.
- Added logging for review submission and moderation actions for better traceability.
- Implemented validation to prevent duplicate reviews and ensure only the review owner can update their review.

django/apps/core/models.py

@@ -34,39 +34,15 @@ class BaseModel(LifecycleModel, TimeStampedModel):
 
 class VersionedModel(DirtyFieldsMixin, BaseModel):
     """
-    Abstract base model for entities that need version tracking.
+    Abstract base model for entities that track field changes.
     
-    Automatically creates a version record whenever the model is created or updated.
     Uses DirtyFieldsMixin to track which fields changed.
+    History tracking is now handled automatically by pghistory decorators.
+    
+    Note: This class is kept for backwards compatibility and the DirtyFieldsMixin
+    functionality, but no longer triggers custom versioning.
     """
     
-    @hook(AFTER_CREATE)
-    def create_version_on_create(self):
-        """Create initial version when entity is created"""
-        self._create_version('created')
-    
-    @hook(AFTER_UPDATE)
-    def create_version_on_update(self):
-        """Create version when entity is updated"""
-        if self.get_dirty_fields():
-            self._create_version('updated')
-    
-    def _create_version(self, change_type):
-        """
-        Create a version record for this entity.
-        Deferred import to avoid circular dependencies.
-        """
-        try:
-            from apps.versioning.services import VersionService
-            VersionService.create_version(
-                entity=self,
-                change_type=change_type,
-                changed_fields=self.get_dirty_fields() if change_type == 'updated' else {}
-            )
-        except ImportError:
-            # Versioning app not yet available (e.g., during initial migrations)
-            pass
-    
     class Meta:
         abstract = True