qualtRics 3.3.0

• Migrated all_mailinglists() and fetch_mailinglist() from the deprecated
  Research Core Contacts API endpoints to the XM Directory API endpoints, ahead
  of Qualtrics retiring the old endpoints on June 30, 2026 (#386). The directory
  ID is discovered automatically from the API (or can be set with the
  QUALTRICS_DIRECTORY_ID environment variable), so no change to your code is
  needed to keep these functions working.

  Note that the XM Directory endpoints return a different data shape, so code
  that referenced the old column names will need to be updated:

  • all_mailinglists(): the id column is now mailingListId; the
    libraryId, category, and folder columns are no longer returned; and
    contactCount, ownerId, and creation/modification date columns are now
    included.
  • fetch_mailinglist(): the id column is now contactId, and
    externalDataReference is now extRef.