Add history tracking functionality using django-pghistory; implement views, templates, and middleware for event serialization and context management

moderation/models.py

@@ -9,11 +9,13 @@ from django.core.exceptions import ObjectDoesNotExist, FieldDoesNotExist
 from django.contrib.auth.base_user import AbstractBaseUser
 from django.contrib.auth.models import AnonymousUser
 from django.utils.text import slugify
+import pghistory
+from core.models import HistoricalModel
 
 UserType = Union[AbstractBaseUser, AnonymousUser]
 
-
-class EditSubmission(models.Model):
+@pghistory.track()  # Track all changes by default
+class EditSubmission(HistoricalModel):
     STATUS_CHOICES = [
         ("PENDING", "Pending"),
         ("APPROVED", "Approved"),
@@ -196,8 +198,8 @@ class EditSubmission(models.Model):
         self.handled_at = timezone.now()
         self.save()
 
-
-class PhotoSubmission(models.Model):
+@pghistory.track()  # Track all changes by default
+class PhotoSubmission(HistoricalModel):
     STATUS_CHOICES = [
         ("PENDING", "Pending"),
         ("APPROVED", "Approved"),
@@ -287,7 +289,6 @@ class PhotoSubmission(models.Model):
         if user_role in ["MODERATOR", "ADMIN", "SUPERUSER"]:
             self.approve(self.user)
 
-
     def escalate(self, moderator: UserType, notes: str = "") -> None:
         """Escalate the photo submission to admin"""
         self.status = "ESCALATED"