VECTOR_OF_UINT8

Multi-byte payload becomes a JS Array<bigint> where each element is one byte from WitnessResult.data lifted to a BigInt. Matches Compact's Vector<N, Uint<8>> (also written as Vector<N, Uint<0..256>> in runtime error messages).

Kicks's V3 contract uses this for localShoots / localKeeps: 5 picks per player, each in range 0..2 (L/C/R), packed into a single witness so the whole regulation commits in one transaction.