初步实验使用KV数据库（pebble）存储缓存索引

internal/utils/kvstore/value_encoder_bytes.go

@@ -0,0 +1,24 @@
+// Copyright 2024 GoEdge CDN goedge.cdn@gmail.com. All rights reserved. Official site: https://goedge.cn .
+
+package kvstore
+
+type BytesValueEncoder[T []byte] struct {
+}
+
+func NewBytesValueEncoder[T []byte]() *BytesValueEncoder[T] {
+	return &BytesValueEncoder[T]{}
+}
+
+func (this *BytesValueEncoder[T]) Encode(value T) ([]byte, error) {
+	return value, nil
+}
+
+func (this *BytesValueEncoder[T]) EncodeField(value T, fieldName string) ([]byte, error) {
+	_ = fieldName
+	return this.Encode(value)
+}
+
+func (this *BytesValueEncoder[T]) Decode(valueData []byte) (value T, err error) {
+	value = valueData
+	return
+}