- Standalone Activities are now GA with defaults enabled, adding operator APIs, batch operations, and default eager execution for activities.
- The unified query converter is enabled by default, introducing breaking type‑validation changes, altering VisibilityRow.ExecutionDuration to int64, and deprecating the legacy converter.
- Worker versioning deprecation is finalized; new one‑time version overrides and default version reactivation signals are added, alongside poller autoscaling metrics/configuration and matching observability improvements with bug fixes.