feat(m9): .deb package + CI build/publish — 0.35.0

packaging/make_deb.py builds rigdoctor_<ver>_all.deb (Architecture: all) via
dpkg-deb, no debhelper: Depends python3; Recommends python3-pyside6/pyte (GUI by
default, --no-install-recommends = CLI only). Installs the package, both
launchers, desktop entry + icon; postinst refreshes the desktop database.
release.yml builds it as a release asset and optionally pushes to the Gitea apt
registry (REGISTRY_TOKEN). Verified locally: valid .deb, packaged launcher runs
'rigdoctor --version'. Docs/README/ROADMAP/MODULES updated; M9 complete.

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

CHANGELOG.md

@@ -5,6 +5,16 @@ All notable changes to RigDoctor are recorded here. Format follows
 (`MAJOR.MINOR.PATCH`, pre-1.0). `__version__` and `pyproject.toml` must match the git
 release tag (so the auto-updater, D18, can compare versions).
 
+## [0.35.0] - 2026-05-22
+### Added
+- **`.deb` package (M9 / D8)** — `packaging/make_deb.py` builds a `rigdoctor_<version>_all.deb`
+  (pure-Python, `Architecture: all`) via `dpkg-deb`: `Depends: python3`, with the GUI deps
+  (`python3-pyside6`, `python3-pyte`) as **Recommends** so `sudo apt install ./rigdoctor_*.deb`
+  gives the full app and `--no-install-recommends` gives CLI-only. Installs the package, both
+  launchers, the desktop entry, and the icon. CI (`release.yml`) builds it as a **release asset**
+  every release, and optionally publishes it to the Gitea **apt registry** (set a `REGISTRY_TOKEN`
+  secret) for `sudo apt install rigdoctor`. **M9 is now complete.**
+
 ## [0.34.0] - 2026-05-22
 ### Added
 - **Event-based alerts (M8).** Beyond temperature + GPU-lost, RigDoctor now notifies on