v0.20.0

• Changed (API): contacts.list({ search }) with several whole addresses
  separated by commas, spaces or line breaks now returns exactly those
  contacts (up to 200), the same as Mailtea Studio and MCP. A list with an
  entry that is not a whole address is refused with a 400 naming it. Part of
  an address still matches as before. The search field documents this.
• Added: "domain_managed" to DomainRefusalCode. domains.update on the
  Mailtea-managed domain (<slug>.mailtea.email) is now refused with it (400)
  instead of changing a domain Mailtea runs. Needs the API deployed with this
  change.
• Added: CreateDomainClaimInput.purpose ("email", "site" or "both",
  default "email") and DomainClaim.purpose. A claim now creates the domain
  with that purpose, so a website-only domain no longer needs a domains.update
  afterwards, and a "site" claim gets no sending identity. Claims opened
  before this change report "email". Needs the API deployed with this change.
• Added: Post.segment_id, CreatePostInput.segment_id and
  UpdatePostInput.segment_id (null clears it). A post with a segment goes
  to that segment's active contacts instead of all active contacts; the
  segment must be in the post's publication, or the request is refused with a
  422. The segment is resolved when the post is sent, and a send to a segment
  that cannot be resolved or matches nobody is refused rather than widened to
  the whole list. A segment that a draft, scheduled or sending post targets
  cannot be deleted: segments.delete fails with a 409 segment_in_use, so
  point those posts at another segment or clear their segment_id first. Deleting one used to send those posts to everyone.
• Added: Segment.inactive_days, CreateSegmentInput.inactive_days and
  UpdateSegmentInput.inactive_days (null clears it): contacts with no open
  or click in the last N days (1 to 3650), counting contacts who never
  engaged. It selects the silent cohort, not engaged readers. Engagement
  tracking is not backfilled, so contacts with no recorded engagement count
  as inactive. Both need the API deployed with this change; this release adds
  the fields to the types.

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Released from mailtea-app/mailtea@1ea0e1b.