Routes ALSA's "default" device through PulseAudio/PipeWire. Was a manual,
untracked fix living only on archy-x250-exp — a reprovision or fresh image
would silently lose it, same failure mode that already bit the GPU-flags
and CPUQuota fixes. Wired into deploy-to-target.sh (both the primary --live
path and the .198/.253 secondary-copy path) and deploy-tailscale.sh, mirroring
the existing 99-mesh-radio.rules udev sync pattern (diff-check, copy if changed).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
