feat: 实现用户注册功能，包括数据库表结构、gRPC 服务和业务逻辑

backend/services/user-svc/migrations/001_init.sql

@@ -0,0 +1,33 @@
+-- 创建 user_main 表
+CREATE TABLE IF NOT EXISTS user_main (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    deleted BOOLEAN DEFAULT false,
+    create_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    update_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- 创建 user_login_account 表
+CREATE TABLE IF NOT EXISTS user_login_account (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    user_id UUID NOT NULL REFERENCES user_main(id),
+    account VARCHAR(255) NOT NULL,
+    deleted BOOLEAN DEFAULT false,
+    create_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    update_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE(account)
+);
+
+-- 创建 user_login_password 表
+CREATE TABLE IF NOT EXISTS user_login_password (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    user_id UUID NOT NULL REFERENCES user_main(id),
+    password VARCHAR(255) NOT NULL,
+    deleted BOOLEAN DEFAULT false,
+    create_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    update_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- 创建索引
+CREATE INDEX IF NOT EXISTS idx_user_login_account_user_id ON user_login_account(user_id);
+CREATE INDEX IF NOT EXISTS idx_user_login_account_account ON user_login_account(account);
+CREATE INDEX IF NOT EXISTS idx_user_login_password_user_id ON user_login_password(user_id);