调整项目结构

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

@@ -1,15 +0,0 @@
--- 用户表初始化
-CREATE TABLE IF NOT EXISTS users (
-    id SERIAL PRIMARY KEY,
-    username VARCHAR(50) UNIQUE NOT NULL,
-    password_hash VARCHAR(255) NOT NULL,
-    email VARCHAR(100) UNIQUE,
-    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
-    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
-);
-
--- 插入测试用户（密码: 123456）
--- bcrypt hash: $2b$12$REwMlLDCbzR4UpL6MWnzE.AacihwpFvQhGs7vDKTwwyNMb1qBWOTm
-INSERT INTO users (username, password_hash, email) 
-VALUES ('admin', '$2b$12$REwMlLDCbzR4UpL6MWnzE.AacihwpFvQhGs7vDKTwwyNMb1qBWOTm', 'admin@example.com')
-ON CONFLICT (username) DO NOTHING;