the agent prints the daemon's version, from the constant the packaging reads

The agent answered --version with "fingerprintd-agent 0.2.2", the string
it was written with, while the daemon's constant went 0.2.3, 0.2.4, 0.2.5:
the subpackage carried the package's version and reported another. The
constant moves from main.cpp into the module both products import, with
its note on what a bump publishes; the two scripts that derive pkgver
from it, the APKBUILD's header and the CI comment name the new file. The
APKBUILD's own pkgver stays a hand-kept copy, which a bump changes too.

packaging/APKBUILD

@@ -4,7 +4,7 @@
 # Binary packaging: wraps a crafter-build binary cross-compiled per the
 # README's "Cross-compiling" section into a proper apk — used by this repo's
 # package CI (packaging/build-package.sh, which seds pkgver from
-# implementations/main.cpp) and runnable by hand. The source tarball is
+# interfaces/Fingerprintd.cppm) and runnable by hand. The source tarball is
 # produced by packaging/make-bin-tarball.sh. There is deliberately no
 # source-building aport: the build driver is crafter-build, which is not in
 # Alpine, so an APKBUILD that compiled from source could not be built by