restructure backups

modules/homelab/immich/default.nix

@@ -108,7 +108,7 @@ in {
     ];
 
     # add to backups
-    system.backups.baks = {
+    homelab.baks = {
       #${service} = {paths = [cfg.data_dir "/var/lib/redis-immich" "/var/backup/postgresql/immich.sql.zstd"];};
       ${service} = {paths = [cfg.data_dir "/var/backup/postgresql/immich.sql.zstd"];};
     };