clanService/wordpress: symlink upgrade-temp-backup and ai1wm-backups to state dir

WordPress writes into wp-content/upgrade-temp-backup (core rollback on
theme/plugin updates) and wp-content/ai1wm-backups (All-in-One WP
Migration). Both sit directly under wp-content, which is the read-only
Nix store path, so creation fails.

Symlink both dirs out to the writable state dir and add matching
tmpfiles rules, same pattern as themes/plugins/upgrade.

Fixes "Could not create the upgrade-temp-backup directory" on Bricks
theme update, and the ai1wm-backups permission errors.

flake.lock

@@ -294,11 +294,11 @@
         "std": "std"
       },
       "locked": {
-        "lastModified": 1780907315,
+        "lastModified": 1782964989,
-        "narHash": "sha256-MR859lKVKeItsC5wnd1oniBar2lBTA+FJ7Bx4xN1Wpk=",
+        "narHash": "sha256-pU2Gye+1f+nvFleBTgXdeQfrQnKaJEuO2LT7PnsJ1p0=",
         "owner": "kurogeek",
         "repo": "frappix",
-        "rev": "9c2bc4152bce6d91305bcf0563a8a715860c405d",
+        "rev": "ac5e2814fc1aca188080bf6b50504cd329790e56",
         "type": "github"
       },
       "original": {

machines/deneb/configuration.nix

@@ -56,6 +56,7 @@ in
       pkgs.frappix.erpnext
       pkgs.frappix.hrms
       pkgs.frappix.crm
+      pkgs.frappix.posprinter
     ];
     sites = {
       "${sitename}" = {
@@ -65,6 +66,7 @@ in
           "erpnext"
           "hrms"
           "crm"
+          "posprinter"
         ];
       };
     };

modules/clan/wordpress/default.nix

@@ -83,6 +83,7 @@
                   ln -s "${stateDir hostName}"/wp-content/plugins $out/share/wordpress/wp-content/plugins
                   ln -s "${stateDir hostName}"/wp-content/upgrade $out/share/wordpress/wp-content/upgrade
                   ln -s "${stateDir hostName}"/wp-content/upgrade-temp-backup $out/share/wordpress/wp-content/upgrade-temp-backup
+                  ln -s "${stateDir hostName}"/wp-content/ai1wm-backups $out/share/wordpress/wp-content/ai1wm-backups
 
                 '';
               };
@@ -110,6 +111,8 @@
                 "Z '${stateDir tenant}/wp-content/upgrade' 0750 ${user} ${webserver.group} - -"
                 "d '${stateDir tenant}/wp-content/upgrade-temp-backup' 0750 ${user} ${webserver.group} - -"
                 "Z '${stateDir tenant}/wp-content/upgrade-temp-backup' 0750 ${user} ${webserver.group} - -"
+                "d '${stateDir tenant}/wp-content/ai1wm-backups' 0750 ${user} ${webserver.group} - -"
+                "Z '${stateDir tenant}/wp-content/ai1wm-backups' 0750 ${user} ${webserver.group} - -"
               ]) settings.tenants
             );