Unify labels, byte units, snapshot numbers and spelling

internal/store/migrations/107-rename-merge-after-review-canceled.sql

@@ -0,0 +1 @@
+UPDATE events SET kind = 'task.merge_after_review_canceled' WHERE kind = 'task.merge_after_review_cancelled';

internal/store/readyprompt.go

@@ -121,7 +121,7 @@ func readyPrompts(ctx context.Context, tx *sql.Tx, emit emitFunc) ([]ReadyPrompt
 		for _, r := range reviews {
 			if r.State == api.ReviewStateFailed && c.background {
 				err = emit(api.Event{Kind: "session.error", ProjectId: &c.projectID, TaskId: &c.TaskID, Actor: "byre", Payload: map[string]any{
-					"error": fmt.Sprintf("Review %q of snapshot %d failed: %s. The audit can't go on without you.", r.Stage, c.Snapshot, r.Error),
+					"error": fmt.Sprintf("Review %q of snapshot #%d failed: %s. The audit can't go on without you.", r.Stage, c.Snapshot, r.Error),
 				}})
 				if err != nil {
 					return nil, err

internal/store/review.go

@@ -137,7 +137,7 @@ func endReviews(ctx context.Context, tx *sql.Tx, emit emitFunc) ([]EndedReviewer
 		case !r.active:
 			reason = "the task was closed"
 		case r.n < r.current:
-			reason = fmt.Sprintf("superseded by snapshot %d", r.current)
+			reason = fmt.Sprintf("superseded by snapshot #%d", r.current)
 		case r.state != string(api.AgentSessionStateRunning):
 			reason = "the reviewer stopped before submitting a review"
 		default:

internal/store/store.go

@@ -687,7 +687,7 @@ func (s *Store) CancelMergeAfterReview(ctx context.Context, id, actor string) er
 		if err != nil {
 			return err
 		}
-		return emit(api.Event{Kind: "task.merge_after_review_cancelled", ProjectId: &projectID, TaskId: &id, Actor: actor, Payload: map[string]any{"id": id}})
+		return emit(api.Event{Kind: "task.merge_after_review_canceled", ProjectId: &projectID, TaskId: &id, Actor: actor, Payload: map[string]any{"id": id}})
 	})
 }