* feat(ci): gate AUR PKGBUILD builds on every PR
Nothing ever ran makepkg on the PKGBUILD before a tag pushed it to AUR
users, and the channel broke twice that way (#736, #757) — a PKGBUILD
change did not even start a CI job, because no paths filter matched
packaging/aur/**.
The gate (packaging/aur/build-test.sh, run in archlinux:latest — the
AUR is a rolling channel, so the image stays deliberately unpinned):
- swaps the tag-archive source= for a git archive of the checkout under
the same filename and prefix, so build()/package() run unchanged and
the gate answers "does this commit build on Arch"
- installs depends/makedepends from the repos; python-pywhispercpp
(virtual, provided by the AUR backends, #579) and python-pynput (AUR)
are satisfied by a stub so makepkg still verifies the full depends
set, and pip-installed from the hash-pinned requirements/runtime.txt
for the import smoke
- runs namcap on the PKGBUILD and the built package, failing on errors
only (its warnings are noise around lazy imports and virtual depends)
- installs the package and imports the whole UI/recognition stack, plus
the vocalinux --version entry point
Part of #701 (phase 6).
* fix(ci): stop partial-upgrading in the AUR gate and correct the #736 attribution
