fix(deps): pin @scure/bip39 to 1.6.0 for Node 20.10 engine compat
@scure/bip39@2.0.1 resolves @noble/hashes@2.0.1, whose engine requires
Node >=20.19.0, so a strict install breaks on Node 20.10.x even though
engines.node is >=20.10.0. Pin @scure/bip39 to 1.6.0, whose @noble/hashes
~1.8.0 dedupes with the existing top-level @noble/hashes@1.8.0, and switch
the wordlist import to the v1 subpath (@scure/bip39/wordlists/english).
The BIP39 English wordlist is byte-identical between the two versions, so
cap-ref output is unchanged. Regenerate both lockfiles and bump to 0.6.1.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>