Editing GitLab V18 Upgrade (section)

===Example `values.yaml` addition:===


 # Add this to your values.yaml file
 postgresql:
   # This section assumes you are using the bundled PostgreSQL with the GitLab chart.
   # If using an external PostgreSQL, you would need to run this command on your external DB.
   initdb:
     ## @param initdb.scripts Allows mounting scripts into /docker-entrypoint-initdb.d/ to be executed at first boot of the Postgres container
     ## This can be used for custom grants or other database initialization.
     scripts:
       grant-wal-permissions.sql: |
         DO
         $do$
         BEGIN
           IF EXISTS (SELECT 1 FROM pg_catalog.pg_proc p JOIN pg_catalog.pg_namespace n ON p.pronamespace = n.oid WHERE p.proname = 'pg_ls_waldir' AND n.nspname = 'pg_catalog') THEN
             GRANT EXECUTE ON FUNCTION pg_catalog.pg_ls_waldir() TO gitlab; -- Replace 'gitlab' with your actual GitLab database user if different
           END IF;
           -- Also consider granting pg_monitor role if appropriate for your security model
           IF EXISTS (SELECT 1 FROM pg_roles WHERE rolname = 'pg_monitor') THEN
             GRANT pg_monitor TO gitlab; -- Replace 'gitlab' with your actual GitLab database user if different
           END IF;
         END
         $do$;