Support for new storage backends, such as LMDB

【需求描述】
1. 替换当前基于RocksDB的存储底座（比如lmdb）

【产出期望】
1. 期望替换后，功能满足需求，性能比当前基于RocksDB的存储底座性能更好

如有疑问请联系： @tanghaodong25

The issue names the current RocksDB storage base and LMDB as an example, but no files, tests, or entry points. First map where the storage backend is selected and how current RocksDB behavior is measured; define the replacement scope and performance target before implementation. Done means the required functionality works with the new backend and it performs better than RocksDB.

Written by the indexing model from the issue text.