v0.4.2

Added

• collectionLogPinId({ spaceId, collectionId }) builds the pin slot key
  space/<spaceId>/<collectionId>/meta/log, for a Collection's governing
  history log at its meta/log sub-resource.

Changed

• The sealing-sweep test suite (sealResourceLog,
  latestAssertionRemovalIndex) moved into this repo's own test run, so a seal
  regression is caught here instead of only in a consumer's tests.

• The verify test suite now covers four previously untested refusal branches: a
  proof outside the profile's fixed shape, a non-object parameters member, a
  proof verificationMethod that is not a versioned DID URL, and a pinned head
  carrying no ordinal (refused as a fork with the served entries retained).

• New entry.ts unit tests pin versionIdOrdinal's parsing table and the
  builder-side guards: both entry builders refuse a state carrying the reserved
  history member, and buildResourceLogEntry refuses a head whose versionId
  carries no ordinal.