chore: fix pghistory migration deps and improve htmx utilities

- Update pghistory dependency from 0007 to 0006 in account migrations
- Add docstrings and remove unused imports in htmx_forms.py
- Add DJANGO_SETTINGS_MODULE bash commands to Claude settings
- Add state transition definitions for ride statuses

backend/apps/parks/services.py

@@ -146,11 +146,7 @@ class ParkService:
         """
         with transaction.atomic():
             park = Park.objects.select_for_update().get(id=park_id)
-            park.status = "DEMOLISHED"
-
-            # CRITICAL STYLEGUIDE FIX: Call full_clean before save
-            park.full_clean()
-            park.save()
+            park.demolish(user=deleted_by)
 
             return True