Compiled wasm is code, not media: dist/ leaves the immutable class

The MEDIA_MANIFEST invariant fired on the synthesis-depth recompiles and was right for the third time: engine/faust/dist/ wasm changes under the same name whenever a .dsp recompiles — an immutable cache would serve STALE SYNTHESIS to returning visitors after any voice change.

▶ Play it: Rail Replacement Rapture — a bed-heavy genre where the found-sound layer carries the room https://stellate.app/?genre=transitwave&seed=4047&path=749.12536,768.12569,730.12569&xdur=13.122

93bb61e https://github.com/aboard-io/stellate/commit/93bb61e7ce467b6544102700e7887939b207e69a