Found rolling the runtime out to the catalogue: a module's runtime reads its settings-merged config file once at start, but a container is only recreated on a spec change, and file content is not part of the spec. So updating settings re-renders the file and nothing re-reads it — ADR 0051's "on the fly" holds only for config set before first start. Services have restart-on; containers do not. Claude-Session: https://claude.ai/code/session_01LrgweAeERJYBg88c5cKDzF