Add defensive hash length check to VerifyTrait.php

[shleeable]

I hope this is suitable.

SHA-256 produces a fixed-length 265-bit (32-byte)
SHA-384 produces a fixed-length 384-bit (48-byte)
SHA-512 produces a fixed-length 512-bit (64-byte)
BLAKE2b produces a variable-length 8 to 512 bits (1 to 64 bytes) but I assume we're looking for a floor of 32.

[shleeable]

ok. I am bad at tests.. so might need you to expand on that side if this has merit for you. otherwise, just close.

[soatok]

Hey, I appreciate the effort. I think I can fix the mutation testing issues after merging.