add convenience method for casting payloads

internal/processor/osc-message-decode.go

@@ -13,7 +13,7 @@ type OSCMessageDecode struct {
 }
 
 func (omd *OSCMessageDecode) Process(ctx context.Context, payload any) (any, error) {
-	payloadBytes, ok := payload.([]byte)
+	payloadBytes, ok := GetAnyAs[[]byte](payload)
 
 	if !ok {
 		return nil, errors.New("osc.message.decode processor only accepts a []byte payload")