Companion to peerspeak's packaging/debian/README. Captures the shared bookworm
distrobox build, the box-local CARGO_TARGET_DIR, and — most importantly — why
the GStreamer capture stack is hard-coded into Depends (invoked as subprocesses,
invisible to dpkg-shlibdeps).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
