- Change DB backup helpers to return whether a dump was actually produced - Detect DB containers without successful dumps in --dump-only mode - Fallback to file backups with a warning instead of skipping silently - Refactor DB dump logic to return boolean status - Add E2E test covering dump-only fallback when databases.csv entry is missing https://chatgpt.com/share/6951a659-2b0c-800f-aafa-3e89ae1eb697