scoreview-engine v4.7.6-engine.3

release v4.7.6-engine.3

emsdk 6.0.13 (#23), the last open item of the dependency check (#12).
Nothing this build uses moved between 6.0.9 and 6.0.13, and the zlib port
is still 1.3.2 with the same hash.

Output is unchanged: the native corpus is not touched by the toolchain,
and the wasm gate fires the same eleven waivers on the same eleven scores
as under 6.0.9, byte counts identical.

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