feat: add middleware.cache

internal/database/cache/client.go

@@ -23,6 +23,11 @@ func handleValue(value any) ([]byte, error) {
 		err error
 	)
 
+	switch value.(type) {
+	case []byte:
+		return value.([]byte), nil
+	}
+
 	if imp, ok := value.(encoded_value); ok {
 		bs, err = imp.MarshalBinary()
 	} else {