feat: add user search/filter, banned metric, mobile review API, event detail improvements

- admin_api/views.py: Add banned count to UserMetrics, fix server-side search/filter in UserListView
- admin_api/models.py: Add ReviewInteraction model, display_name/is_verified/helpful_count/flag_count to Review
- mobile_api/views/reviews.py: Customer-facing review submit/list/helpful/flag endpoints
- mobile_api/urls.py: Wire review API routes
- mobile_api/views/events.py: Event detail and listing improvements
- Security hardening across API modules

accounts/api.py

@@ -38,7 +38,7 @@ def _partner_user_to_dict(user, request=None):
     # Add profile picture URL if exists
     if getattr(user, "profile_picture", None):
         if request:
-            data["profile_picture"] = request.build_absolute_uri(user.profile_picture.url)
+            data["profile_picture"] = user.profile_picture.url
         else:
             data["profile_picture"] = user.profile_picture.url
     else: