scoreview-engine v4.7.6-engine.1

release v4.7.6-engine.1

MuseScore 4.7.6 (#20). One change reaches this engine: RepeatList::unwind()
now plays a volta whose endings all lie beyond the exhausted repeats after
them. Under 4.7.5 such a score stopped at that volta - upstream's
repeat70/71 played measures 1;2;1, repeat72 1;2;1;4;5, instead of
1;2;1;3;4;5 - in MIDI and in mpos alike. CI now checks that order on
repeat70.mscx, since no vtest score has such a volta.

Everything else held still: no shadow copy drifted, and the native corpus
report is identical to 4.7.5's for all 570 scores, SVG bytes included; the
wasm gate fires the same eleven waivers. The counter starts again at 1
with the MuseScore version.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>