1.6.0

Changed

• The five sender-identity classes moved to goldnead/statamic-brand-context 1.8.0, which is
  now required at ^1.8. They were four byte-identical copies with four namespaces — this package,
  marketing, preference-center and automations each grew their own on 12.08.2026 — and copies drift:
  by the evening the marketing one had stopped refusing a transport without an address. Which
  address a brand sends under is a property of the brand, so the rule lives with the brand.

  Behaviour is unchanged here, down to the log lines. Goldnead\Notifications\Contracts\SenderIdentityResolver
  and Sending\BrandMailer stay as this package's own extension points, so a host can still answer
  "who does a notification come from" separately from "who does marketing post come from".
  Sending\SenderIdentity and Sending\SaidRecently are gone from this namespace; use the
  Goldnead\BrandContext\Sending\ versions.