updated as per the review comments

pkg/plugin/definition/publisher.go

@@ -5,12 +5,10 @@ import "context"
 // Publisher defines the general publisher interface for messaging plugins.
 type Publisher interface {
 	// Publish sends a message (as a byte slice) using the underlying messaging system.
-	Publish(ctx context.Context, msg []byte) error
-
-	Close() error // Important for releasing resources.
+	Publish(context.Context, string, []byte) error
 }
 
 type PublisherProvider interface {
 	// New initializes a new publisher instance with the given configuration.
-	New(ctx context.Context, config map[string]string) (Publisher, error)
+	New(ctx context.Context, config map[string]string) (Publisher, func(), error)
 }