Fix analyze_data_completeness and admin guard

- Add migration to fix JSONB array filtering in analyze_data_completeness
- Update useDataCompleteness to run only on admin pages via isAdminPage check
- Prepare for replacing invalid JSONB subtraction with proper filtering in RPCs

src/hooks/useDataCompleteness.ts

@@ -6,12 +6,15 @@
  */
 
 import { useQuery, useQueryClient } from '@tanstack/react-query';
+import { useLocation } from 'react-router-dom';
 import { supabase } from '@/integrations/supabase/client';
 import { useEffect } from 'react';
 import type { CompletenessAnalysis, CompletenessFilters } from '@/types/data-completeness';
 import { handleError } from '@/lib/errorHandler';
 
 export function useDataCompleteness(filters: CompletenessFilters = {}) {
+  const location = useLocation();
+  const isAdminPage = location.pathname.startsWith('/admin');
   const queryClient = useQueryClient();
 
   const query = useQuery({
@@ -40,6 +43,7 @@ export function useDataCompleteness(filters: CompletenessFilters = {}) {
         throw error;
       }
     },
+    enabled: isAdminPage, // Only run on admin pages
     staleTime: 5 * 60 * 1000, // Cache for 5 minutes
     refetchOnWindowFocus: false,
   });