fix(events): harden nil context handling and thread ctx into rollback

Add a nil-context guard to EventContextFromContext so it returns nil
instead of panicking on a nil ctx, and use the request-scoped ctx in
rollbackDigestManifestTags for DeleteImageManifest/PutImageManifest so
rollbacks honor cancellation and carry event metadata.

Signed-off-by: cainydev <wajo432@gmail.com>

Author: cainydev

pkg/extensions/events/common.go

@@ -50,6 +50,10 @@ func WithEventContext(ctx context.Context, ec *EventContext) context.Context {
 
 // EventContextFromContext retrieves the EventContext from a context.Context.
 func EventContextFromContext(ctx context.Context) *EventContext {
+	if ctx == nil {
+		return nil
+	}
+
 	ec, _ := ctx.Value(eventContextKey{}).(*EventContext)
 
 	return ec

pkg/meta/hooks.go

@@ -91,7 +91,7 @@ func rollbackDigestManifestTags(ctx context.Context, repo string, tags, appliedM
 
 	for i := range slices.Backward(tags) {
 		refTag := tags[i]
-		if delErr := imgStore.DeleteImageManifest(context.Background(), repo, refTag, false); delErr != nil &&
+		if delErr := imgStore.DeleteImageManifest(ctx, repo, refTag, false); delErr != nil &&
 			!errors.Is(delErr, zerr.ErrManifestNotFound) {
 			log.Error().Err(delErr).Str("repository", repo).Str("tag", refTag).
 				Msg("multi-tag digest push: rollback DeleteImageManifest failed")
@@ -126,7 +126,7 @@ func rollbackDigestManifestTags(ctx context.Context, repo string, tags, appliedM
 			continue
 		}
 
-		if _, _, putErr := imgStore.PutImageManifest(context.Background(), repo, prior.digest.String(), prior.mediaType,
+		if _, _, putErr := imgStore.PutImageManifest(ctx, repo, prior.digest.String(), prior.mediaType,
 			restoreBody, []string{refTag}); putErr != nil {
 			log.Error().Err(putErr).Str("repository", repo).Str("tag", refTag).
 				Msg("multi-tag digest push: rollback restore prior manifest in store failed")