feat(ids): 实现基于Snowflake的分布式ID生成功能

新增rs-snowflake依赖并实现分布式ID生成工具
在utils模块中添加ids子模块，提供业务ID生成与解析功能
替换原有UUID生成方式为分布式ID生成器

backend/src/main.rs

@@ -64,6 +64,9 @@ async fn main() -> anyhow::Result<()> {
     let redis_pool = redis::init_redis().await?;
     redis::set_redis_pool(redis_pool)?;
 
+    // 初始化分布式ID生成器（读取 ID_MACHINE_ID / ID_NODE_ID）
+    crate::utils::init_from_env();
+
     // run migrations
     migration::Migrator::up(&db, None).await.expect("migration up");
 

backend/src/services/flow_run_log_service.rs

@@ -44,7 +44,7 @@ pub struct CreateRunLogInput {
 
 pub async fn create(db: &Db, input: CreateRunLogInput) -> anyhow::Result<i64> {
     let am = flow_run_log::ActiveModel {
-        id: Default::default(),
+        id: Set(crate::utils::generate_flow_run_log_id()),
         flow_id: Set(input.flow_id),
         flow_code: Set(input.flow_code),
         input: Set(input.input),

backend/src/services/flow_service.rs

@@ -98,7 +98,7 @@ pub async fn create(db: &Db, req: FlowCreateReq) -> anyhow::Result<FlowDoc> {
         let _parsed: FlowDSL = serde_yaml::from_str(yaml).context("invalid flow yaml")?;
         info!(target: "udmin", "flow.create: yaml parsed ok");
     }
-    let id = uuid::Uuid::new_v4().to_string();
+    let id = crate::utils::generate_flow_id();
     let name = req
         .name
         .clone()

backend/src/services/log_service.rs

@@ -17,7 +17,7 @@ pub struct CreateLogInput {
 
 pub async fn create(db: &Db, input: CreateLogInput) -> anyhow::Result<i64> {
     let am = request_log::ActiveModel {
-        id: Default::default(),
+        id: Set(crate::utils::generate_request_log_id()),
         path: Set(input.path),
         method: Set(input.method),
         request_params: Set(input.request_params),

backend/src/utils/ids.rs

@@ -0,0 +1,83 @@
+use std::sync::Mutex;
+use once_cell::sync::Lazy;
+
+// 采用 rs-snowflake 提供的 SnowflakeIdGenerator
+// machine_id 与 node_id 取值范围建议 < 32
+use snowflake::SnowflakeIdGenerator;
+
+// 全局生成器（按需初始化），以避免重复构造与时序问题
+static GENERATOR: Lazy<Mutex<SnowflakeIdGenerator>> = Lazy::new(|| {
+    let (machine_id, node_id) = read_ids_from_env();
+    Mutex::new(SnowflakeIdGenerator::new(machine_id, node_id))
+});
+
+fn read_ids_from_env() -> (i32, i32) {
+    let machine_id = std::env::var("ID_MACHINE_ID").ok().and_then(|s| s.parse::<i32>().ok()).unwrap_or(1);
+    let node_id = std::env::var("ID_NODE_ID").ok().and_then(|s| s.parse::<i32>().ok()).unwrap_or(1);
+    // 保护：按 0..32 范围裁剪，避免越界（生成器要求 machine_id/node_id < 32）
+    let clamp = |v: i32| if v < 0 { 0 } else if v > 31 { 31 } else { v };
+    (clamp(machine_id), clamp(node_id))
+}
+
+/// 可选：在启动时主动初始化并打印日志，便于观测
+pub fn init_from_env() {
+    let (machine_id, node_id) = read_ids_from_env();
+    // 触发 Lazy 初始化（不获取锁，避免非绑定锁 lint）
+    Lazy::force(&GENERATOR);
+    tracing::info!(target: "udmin", "snowflake init: machine_id={} node_id={}", machine_id, node_id);
+}
+
+/// 业务ID生成器（按示例：主业务16位，子业务8位，Snowflake保留低39位 => 共63位，最高符号位为0）
+pub struct BizIdConfig {
+    pub main_id: u16, // 16 bits
+    pub sub_id: u8,   // 8 bits
+}
+
+impl BizIdConfig {
+    pub const fn new(main_id: u16, sub_id: u8) -> Self { Self { main_id, sub_id } }
+}
+
+/// 生成带业务前缀的分布式ID（返回 i64）
+pub fn generate_biz_id(cfg: BizIdConfig) -> i64 {
+    let mut g = GENERATOR.lock().expect("gen snowflake id");
+    let base_id = g.real_time_generate();
+    // 只保留低 39 位
+    let snowflake_bits = base_id & ((1i64 << 39) - 1);
+    let main_bits = (cfg.main_id as i64) << (39 + 8);
+    let sub_bits = (cfg.sub_id as i64) << 39;
+    main_bits | sub_bits | snowflake_bits
+}
+
+/// 解析业务ID -> (main_id, sub_id, base_id)
+pub fn parse_biz_id(id: i64) -> (u16, u8, i64) {
+    let main_id = ((id >> (39 + 8)) & 0xFFFF) as u16;
+    let sub_id = ((id >> 39) & 0xFF) as u8;
+    let base_id = id & ((1i64 << 39) - 1);
+    (main_id, sub_id, base_id)
+}
+
+// --- 具体业务场景：Flow 使用的一组常量（可按需扩展/调整） ---
+// 你可以把这些常量提到配置或用枚举维护各业务的 main/sub 编码
+const FLOW_MAIN_ID: u16 = 1;
+const FLOW_SUB_ID: u8 = 1;
+
+/// 生成 Flow 的 ID，返回十进制字符串，便于与原先 string 类型主键兼容
+pub fn generate_flow_id() -> String {
+    let id = generate_biz_id(BizIdConfig::new(FLOW_MAIN_ID, FLOW_SUB_ID));
+    id.to_string()
+}
+
+// --- 日志类 ID 的业务位定义与生成 ---
+const FLOW_RUN_LOG_MAIN_ID: u16 = 2;
+const FLOW_RUN_LOG_SUB_ID: u8 = 1;
+
+pub fn generate_flow_run_log_id() -> i64 {
+    generate_biz_id(BizIdConfig::new(FLOW_RUN_LOG_MAIN_ID, FLOW_RUN_LOG_SUB_ID))
+}
+
+const REQUEST_LOG_MAIN_ID: u16 = 3;
+const REQUEST_LOG_SUB_ID: u8 = 1;
+
+pub fn generate_request_log_id() -> i64 {
+    generate_biz_id(BizIdConfig::new(REQUEST_LOG_MAIN_ID, REQUEST_LOG_SUB_ID))
+}

backend/src/utils/mod.rs

@@ -1 +1,4 @@
-pub mod password;
+pub mod password;
+pub mod ids;
+
+pub use ids::{init_from_env, generate_biz_id, parse_biz_id, generate_flow_id, BizIdConfig, generate_flow_run_log_id, generate_request_log_id};