feat(frontend): rename inj roles to sys-front-*, add sys-svc-cdn, cache-busting lookup

Introduce sys-svc-cdn (cdn_paths/cdn_urls/cdn_dirs) and ensure CDN directories + latest symlink.

Rename sys-srv-web-inj-* → sys-front-inj-*; update includes/templates; serve shared/per-app CSS & JS via CDN.

Add lookup_plugins/local_mtime_qs.py for mtime-based cache busting; split CSS into default.css/bootstrap.css + optional per-app style.css.

CSP: use style-src-elem; drop unsafe-inline for styles. Services: fix SYS_SERVICE_ALL_ENABLED bool and controlled flush.

BREAKING CHANGE: role names changed; replace includes and references accordingly.

Conversation: https://chatgpt.com/share/68b55494-9ec4-800f-b559-44707029141d

roles/update-docker/templates/script.py.j2

@@ -144,14 +144,6 @@ def update_discourse(directory):
     else:
         print("Discourse update skipped. No changes in git repository.")
 
-def update_mastodon():
-    """
-    Runs the database migration for Mastodon to ensure all required tables are up to date.
-    """
-    print("Starting Mastodon database migration.")
-    run_command("docker compose exec -T web bash -c 'RAILS_ENV={{ ENVIRONMENT | lower }} bin/rails db:migrate'")
-    print("Mastodon database migration complete.")
-
 def upgrade_listmonk():
     """
     Runs the upgrade for Listmonk
@@ -220,8 +212,6 @@ if __name__ == "__main__":
                     update_discourse(dir_path)
                 elif os.path.basename(dir_path) == "listmonk":
                     upgrade_listmonk()
-                elif os.path.basename(dir_path) == "mastodon":
-                    update_mastodon()
                     
                 # @todo implement dedicated procedure for bluesky
                 # @todo implement dedicated procedure for taiga