Apply database migration for security fixes

supabase/migrations/20251103155059_650b12b2-e3c8-48e7-8d03-3116b05e9fdb.sql

@@ -0,0 +1,78 @@
+-- ============================================================================
+-- CRITICAL SECURITY FIXES (P0)
+-- ============================================================================
+
+-- Fix #1: Profiles Table PII Exposure - Remove anon access
+DROP POLICY IF EXISTS "Public can view non-banned public profiles" ON public.profiles;
+
+CREATE POLICY "Profiles restricted to authenticated users and moderators"
+ON public.profiles
+FOR SELECT
+TO authenticated
+USING (
+  auth.uid() = user_id
+  OR is_moderator(auth.uid())
+);
+
+GRANT SELECT ON public.filtered_profiles TO anon;
+
+COMMENT ON POLICY "Profiles restricted to authenticated users and moderators" ON public.profiles IS
+'SECURITY: Restricts direct profile table access to profile owners and moderators only. Anonymous users must use filtered_profiles view.';
+
+-- Fix #2: User_roles Table - Ensure no public access
+ALTER TABLE public.user_roles ENABLE ROW LEVEL SECURITY;
+
+DROP POLICY IF EXISTS "user_roles are viewable by everyone" ON public.user_roles;
+DROP POLICY IF EXISTS "Public can view user roles" ON public.user_roles;
+DROP POLICY IF EXISTS "Users can view their own roles" ON public.user_roles;
+
+CREATE POLICY "Users can view their own roles only"
+ON public.user_roles
+FOR SELECT
+TO authenticated
+USING (auth.uid() = user_id);
+
+CREATE POLICY "Moderators can view all roles with MFA"
+ON public.user_roles
+FOR SELECT
+TO authenticated
+USING (is_moderator(auth.uid()));
+
+-- Fix #3: Error_summary View - Set SECURITY INVOKER
+DROP VIEW IF EXISTS error_summary;
+
+CREATE VIEW error_summary
+WITH (security_invoker = true)
+AS
+SELECT 
+  error_type,
+  endpoint,
+  COUNT(*) as occurrence_count,
+  COUNT(DISTINCT user_id) as affected_users,
+  MAX(created_at) as last_occurred,
+  MIN(created_at) as first_occurred,
+  ROUND(AVG(duration_ms)::numeric, 2) as avg_duration_ms,
+  (ARRAY_AGG(request_id ORDER BY created_at DESC) 
+    FILTER (WHERE created_at > now() - interval '1 day')
+  )[1:5] as recent_request_ids
+FROM request_metadata
+WHERE error_type IS NOT NULL
+  AND created_at > now() - interval '30 days'
+GROUP BY error_type, endpoint
+ORDER BY occurrence_count DESC;
+
+DROP POLICY IF EXISTS "Moderators can view error metadata" ON request_metadata;
+
+CREATE POLICY "Moderators can view error metadata"
+ON request_metadata
+FOR SELECT
+TO authenticated
+USING (
+  is_moderator(auth.uid())
+  OR user_id = auth.uid()
+);
+
+GRANT SELECT ON error_summary TO authenticated;
+
+COMMENT ON VIEW error_summary IS 
+'Error aggregation view with SECURITY INVOKER - uses caller permissions.';