- /audio/devices now returns sounddevice device names (not pactl source names)
so the stored device name works directly with sd.InputStream
- /audio/combined maps sounddevice names back to pactl source names via
description matching for the loopback commands
- Combined sink description set to 'transkriptor-combined' (no spaces) so
sounddevice name matches the value stored in config
- Add _pactl_source_for_sd_name() helper for the mapping