Fix hash_session_ip function

supabase/migrations/20251101205234_7de0525e-1412-411d-942b-b626d64a0144.sql

@@ -0,0 +1,12 @@
+-- Fix hash_session_ip to use pgcrypto from extensions schema
+CREATE OR REPLACE FUNCTION public.hash_session_ip(session_ip inet)
+RETURNS text
+LANGUAGE plpgsql
+IMMUTABLE
+SET search_path = 'public', 'extensions'
+AS $$
+BEGIN
+  -- Return last 8 chars of SHA256 hash with asterisks prefix for privacy
+  RETURN '****' || RIGHT(encode(digest(session_ip::text || 'session_salt_2025', 'sha256'), 'hex'), 8);
+END;
+$$;