gitea: template compose from role vars; bump to 28.2.0 / postgres 17.11 (WDWL-27)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ansible/roles/gitea/defaults/main.yml

@@ -6,6 +6,10 @@
 # Directory layout on mad-tea-party
 gitea_compose_dir: /opt/gitea
 
+# Image versions
+gitea_version: "28.2.0"
+gitea_postgres_version: "17.11"
+
 # Gitea application settings
 gitea_domain: gitea.mk-labs.cloud
 gitea_root_url: "https://{{ gitea_domain }}"