swarmexec v1.14.1 — release notes render as written

- fix(site): the /releases page now reads the shape of each release note
  instead of assuming a single house style. A note written as prose came
  out as one heading per source line, and an indented block lost its
  layout — v1.14.0 was the first release written that way, so its notes
  were unreadable. The renderer classifies line by line now: bullets stay
  bullets, an indented run keeps its layout as a screen, and a run of
  prose lines becomes one paragraph. Verified against all 60 existing tag
  messages — none of them renders differently than before.
- Site-only. No client or agent changes vs v1.14.0.