reverts 0e08aef, b430a70 and 1170e41 — stream-audio.ts and MUSIC_API.md are
now byte-identical to 2a70bc1.
all three were unwound over two days chasing a mobile playback failure that
turned out to have nothing to do with this plugin. the reasoning that undid
them was elimination, not diagnosis: the duration header did not fix it, so
the etag "must" be the cause. the option never considered was that none of it
was mine, which is the one that was true.
nothing here was measured wrong. removing the per-file ffprobe from the path
before the first byte is the speedup, and it is confirmed in real use.
what the mobile client should know, unchanged from MUSIC_API.md: x-audio-duration
is gone, read durationSec from /meta instead — it arrives with the queue,
before the first stream request.
pastilhas
efc9581889