feat: real release notes, restart button, reliable .run installer (0.0.10)

- feat(ci): set each Gitea release body from the matching CHANGELOG section
  (was hardcoded "Automated release for…")
- feat(updater): show "What's new" — release notes dialog before applying (GUI)
  and in `rigdoctor update` (CLI); fetch_latest/update_state now return notes
- feat(gui): "Restart now" button relaunches the app after an update is applied
- fix(packaging): build the self-extracting .run with a pure-Python extractor
  (packaging/make_run.py) instead of makeself, so it attaches to every release
  (it was silently skipped before)
- chore: adopt Conventional Commits + git-cliff (cliff.toml, packaging/
  changelog.sh) for changelog generation going forward (D20)
- chore(gui): drop internal module refs (M4, M5, …) from Setup descriptions

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docs/MODULES.md

@@ -59,7 +59,8 @@ Status: ⬜ not started · 🟦 designing · 🟨 in progress · ✅ done
   and dependency install via pkexec/sudo — `rigdoctor install [--check] [-y]` + GUI Setup tab.
   The **user-local app install** is `install.sh` (private venv + `~/.local/bin` launchers +
   desktop entry, no root; handles the `python3-venv` prerequisite) plus a self-extracting
-  **`.run`** (makeself, built by CI). *Pending:* config/module selection + `systemd --user`
+  **`.run`** (pure-Python self-extractor, `packaging/make_run.py`, built by CI). *Pending:*
+  config/module selection + `systemd --user`
   service enable.
 - **M12 Session sharing / remote assist** (D16) — let a helper inspect a user's machine, in
   an escalating ladder: (1) **diagnostic bundle export** (inventory + recent log + report,