Keep a stable target per transport binding and fan playback and state
notifications out to every active source. Serialize capture and clock
authority while preserving exact BUSY retries and failure cleanup.
Give microphone data priority over replaceable clock feedback and
reduce feedback traffic on the shared client-to-host FIFO.
Retry short FIFO stalls outside the realtime thread and coalesce
consecutive packets in the existing fixed Windows buffers.
Avoid one broker write per tiny PipeWire quantum without adding
allocations or intentional capture latency.
Open the optional audio broker from a passive worker and move bounded
playback and capture packets through a transport-neutral audio hub.
Attach audio sources after transport initialization without making audio
driver availability part of display transport readiness.
