Sentinel v0.11.1

Sentinel 0.11.1

A packaging hotfix for 0.11.0 — no runtime, configuration, or auth-path
changes.

Fixes

• sentinel-kde now installs from the AUR. package() installed the
  systemd user service and the polkit admin rule from packaging/ (repo
  root), but after the monorepo merge the KDE-specific assets live under
  packaging-kde/packaging/ — those files don't exist at the root, so
  makepkg failed in package(). All KDE packaging assets are now sourced
  from packaging-kde/packaging/ consistently. (CI builds release tarballs
  but never runs package(), which is why this only surfaced on a real
  install.)

• Quieted the cxx-qt build output. GCC 16's new -Wsfinae-incomplete
  diagnostic fires inside Qt6's own qchar.h while compiling the generated
  cxx-qt bridge — not our code. It's now suppressed via CXXFLAGS in the
  KDE helper's build.rs.

Packaging hygiene

• The AUR repositories no longer track release source tarballs (an
  updpkgsums side-effect had been committing them every release); the
  existing ones were removed and a .gitignore added.