Migration Annotations

Add or update one YAML file per v3 module under migration/annotations/. Use stable API IDs without trailing #type or #value facets:

effect/Effect#async:
  replacement: Effect.callback
  note: Use the callback constructor.
  example: Effect.callback((resume) => resume(Effect.void))

Every annotation requires replacement and note; example is optional. Use replacement: none when there is no direct replacement and explain the supported migration strategy instead of inventing an equivalent API.