Auto-deref at &Zeroizing<[u8;32]> call sites, range pattern in generators, useless String::into conversions in tests, unused Zeroizing import. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
VERSION_BYTE = 0x02; v1 blobs rejected with UnsupportedFormatVersion; length-prefix Argon2 input distinguishes collision-engineerable pairs (audit H1 regression test). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>