Document extended audio import validation and cache optimization
Document background probing for export plans
Document shared background probing for media info
Document WMA draining and background format probing
Document library artwork precedence for extended audio
Document nonblocking library cache cleanup
Record tagged audio support and bitrate units
Document pause and stop behavior for pending seeks
Document pending seek load identity race
Document review fixes for async audio preparation
Record CI test parallelism finding
Document extended audio decoder and cache design