feat(eventing): emit lifecycle events for update, delete, reply CRUD

[jackiejou]

Stacked on #760. Until #760 merges, the "Files changed" tab will include the reply edit/delete commit. After #760 merges I will rebase this branch onto master and the diff will collapse to only the eventing changes. Please review only after #760 lands.

Summary

• box-annotations only emitted lifecycle events for the create flow. Other thunks ran their API calls and updated internal state, but withAnnotations listeners on the box-ui-elements side never fired, so the activity feed went stale until reload.
• This adds outbound eventing for five thunks following the existing create.ts pattern:
  • updateAnnotationAction emits annotations_update (also covers resolve/unresolve via annotation.status)
  • deleteAnnotationAction emits annotations_delete
  • createReplyAction emits annotations_reply_create
  • updateReplyAction emits annotations_reply_update
  • deleteReplyAction emits annotations_reply_delete
• Each handler emits via the singleton eventManager with { annotation, error, meta: { requestId, status } }. Reply handlers add an annotationReply field carrying the reply object.
• Generalizes AsyncAction<TArg, TPayload> so each handler can type its action precisely.
• Each success-phase handler short-circuits when the necessary payload is missing instead of emitting a contradictory success event.

Test plan

• In a host app with a linked box-annotations build, edit an annotation message in the in-document popup and verify the activity feed entry text updates inline (no reload).
• Resolve an annotation in the popup, verify the feed entry reflects resolved state. Unresolve and verify it reverses.
• Delete the parent annotation from the popup, verify the entire feed entry disappears.
• Add a reply via the popup, verify the reply appears under the parent in the feed.
• Edit a reply via the popup, verify the reply text updates in the feed.
• Delete a reply via the popup, verify the reply disappears from the feed.
• Confirm yarn jest --testPathPattern="store/eventing" passes (61 tests across 14 suites).