audio service ducking

[emphasize]

Audio service ducking:

• Pauses (... and unpauses) the audio service for the duration the TTS queue is processed or a sound is instantly played.
• if the TTS config key pulse_duck is True, pulse takes precedence to handle this mechanic.

Live tested with pulse_duck on/off

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (dev@1181bcd). Click here to learn what that means.

Additional details and impacted files

@@          Coverage Diff          @@
##             dev     #42   +/-   ##
=====================================
  Coverage       ?   0.00%           
=====================================
  Files          ?       8           
  Lines          ?     958           
  Branches       ?       0           
=====================================
  Hits           ?       0           
  Misses         ?     958           
  Partials       ?       0           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.