align romm shim with jellyfin/navidrome uid pattern (romm_uid/romm_gid)

roles/romm/defaults/main.yml

@@ -11,6 +11,14 @@ romm_restart_policy: "{{ app_restart_policy | default('unless-stopped') }}"
 # Network configuration
 romm_http_port: 8080
 
+# User the romm container runs as. Defaults to app_uid/app_gid (the ansible
+# connection user, or root under become). Override in your playbook to
+# align with host user perms on bind-mounted paths (e.g. NFS). Applies to
+# the romm service only; mariadb manages its own user internally. Also used
+# as the owner of the app-managed subdirectories.
+romm_uid: "{{ app_uid }}"
+romm_gid: "{{ app_gid }}"
+
 # Volume paths
 romm_library_path: "{{ app_dir }}/library"
 romm_assets_path: "{{ app_dir }}/assets"