feat: Multi raft - Githubissues

Walkthrough

此次变更显著简化了数据库配置，将数据库数量从16减少到2，同时将每个数据库的RocksDB实例数量从3降至1。此外，引入了Raft共识机制以增强数据一致性和可靠性。这些修改提升了系统的可靠性和可维护性，并改进了代码的模块化，整体上优化了架构设计。

Changes

文件	变更摘要
`pikiwidb.conf`	数据库数量从16改为2，RocksDB实例从3改为1，将Raft使用设置为`yes`。
`src/CMakeLists.txt`	为`pikiwidb`目标新增私有包含目录`${PROTO_OUTPUT_DIR}`。
`src/base_cmd.cc`	修改`BaseCmd::Execute`函数以使用局部的PRAFT引用。
`src/client.cc`	替换PRAFT全局对象引用，改为通过PSTORE后端访问。
`src/client.h`	新增常量`kChannelTimeoutMS`，值为200。
`src/cmd_admin.cc`	修改`SelectCmd`和`InfoCmd`类的命令标志和状态管理。
`src/cmd_admin.h`	在`InfoCmd`类中新增私有成员变量`praft_`。
`src/cmd_raft.cc`	修改`RaftNodeCmd`和`RaftClusterCmd`类以增强命令处理。
`src/cmd_raft.h`	增强`RaftNodeCmd`和`RaftClusterCmd`类的功能与注释。
`src/praft/praft.cc`	更新`PRaft`类方法，增强集群管理和错误处理。
`src/praft/praft.h`	修改构造函数，增强资源管理和方法接口。
`src/praft/praft.proto`	重构协议缓冲定义，新增节点添加请求和响应消息。
`src/praft/praft_service.cc`	新增`PRaftServiceImpl`类，实现节点添加与移除功能。
`src/store.cc`	扩展`PStore`类功能，增加RPC服务器初始化和区域管理。
`src/store.h`	增加区域管理方法并优化数据结构。
`tests/consistency_test.go`	修改一致性测试的时间参数，提升测试的清晰度。

Sequence Diagram(s)

sequenceDiagram
    participant Client
    participant Server
    participant Raft

    Client->>Server: 请求添加节点
    Server->>Raft: 调用AddPeer方法
    Raft-->>Server: 返回结果
    Server-->>Client: 返回操作结果

🐇 在一片花海中，兔子欢跃跳，
新的数据库，从此更可靠。
小小Raft来助力，数据齐心协力，
两个数据库，轻松又快乐，
兔子说：“这变化，真是妙不可言！” 🌼✨

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OpenAtomFoundation / pikiwidb

feat: Multi raft #390

Summary by CodeRabbit

Walkthrough

Changes

Sequence Diagram(s)