swarmexec v1.8.2

Logs
- New logfmt (key=value) format: level=info msg="…" ts=… — covers Go apps,
  the Docker daemon, HashiCorp tools, etc. Selectable via --log-format and the
  TUI F-cycle.
- Fix: docker logs --timestamps now composes with structured formats; the
  leading RFC3339 stamp is stripped before json/gelf/logfmt decoding (was a
  silent fallback to raw).
- Entry.Timestamp captured from the -t prefix and structured ts/time fields.

UI
- Richer placement diagnosis (why?): surfaces the real reason a node runs no
  task (a failed/rejected task's error + attempt count) instead of "eligible
  but no task scheduled", plus a docker service ps-style task table.

Site
- Release-notes page (de/en/es/fr), generated at build time from the git-tag
  changelogs; reachable at /releases.