v5.5.0

Changed

• Ed25519 multikey decoding (decodeEd25519Multikey, the witness DID key
  check) now delegates to decodeMultikey from
  @interop/data-integrity-core/multihash instead of comparing the
  0xed 0x01 header by hand. Two deliberate tightenings follow: the key must
  now be exactly 32 bytes (previously unchecked), and a multikey must be
  base58btc (z) multibase -- u base64url is no longer accepted. The
  refusal message is now the shared codec's (Unexpected multikey codec: ...)
  rather than multiKey doesn't include ed25519 header (0xed01); the witness
  check keeps its own Witness DID key type must be Ed25519 (multicodec 0xed01): ... message.
• decodeMultikey and MultikeyCodec are re-exported from
  src/utils/multiformats.ts alongside the multihash codec.
• Bumped @interop/data-integrity-core to ^8.7.1, which is where
  decodeMultikey and MultikeyCodec ship.

Removed

• The internal isEd25519Multikey helper; it had no callers left and was not
  part of the package's export surface.