@ai-sdk/gateway@4.0.44

Patch Changes

• 89080c8: feat (provider/gateway): support the async video operation flow (doStart/doStatus) on the v4 video model

• 89080c8: fix (ai/gateway): make retried doStart calls idempotent

  generateVideo retries doStart, which creates a billable generation, so a
  retry after a lost response could start a second one. It now mints one
  idempotency token per logical start — outside the retry closure — and forwards it
  as an idempotency-key header, so a provider that deduplicates (the Vercel AI
  Gateway does) sees the same key on every attempt. GatewayVideoModel simply
  forwards the caller's headers rather than inferring retry identity from an
  options object, which would collide across unrelated calls.