feat(multi-tenancy): implement critical fixes for orphaned users and permissions

- Simplified HasTenantAccess permission logic to ensure every authenticated user has an account.
- Added fallback to system account for OpenAI settings in AI configuration.
- Allowed any authenticated user to check task progress in IntegrationSettingsViewSet.
- Created a script to identify and fix orphaned users without accounts.
- Updated error response handling in business endpoints for clarity.

backend/igny8_core/modules/planner/views.py

@@ -5,6 +5,7 @@ from django_filters.rest_framework import DjangoFilterBackend
 from django.db import transaction
 from django.db.models import Max, Count, Sum, Q
 from django.http import HttpResponse
+from django.conf import settings
 import csv
 import json
 import time
@@ -655,10 +656,10 @@ class KeywordViewSet(SiteSectorModelViewSet):
                     error=validation['error'],
                     status_code=status.HTTP_400_BAD_REQUEST,
                     request=request,
-                    extra_data={
+                    debug_info={
                         'count': validation.get('count'),
                         'required': validation.get('required')
-                    }
+                    } if settings.DEBUG else None
                 )
             
             # Validation passed - proceed with clustering