feat (infra): Trae 完成 asset_helper_backend 微服务基础架构 V1 初始化

核心实现：搭建 Monorepo 架构，完成 shared 共享包、gateway、user-service 基础框架开发
技术落地：严格匹配指定技术栈版本，完成 Docker、gRPC、FastAPI、PostgreSQL、Redis 等配置，实现服务间基础连通
配套文件：生成 Makefile、环境变量模板、数据库 / 脚本初始化文件及启动验证文档
架构定位：仅搭建基础架构骨架，无任何业务逻辑、业务规则及业务相关字段，为后续业务开发提供支撑

asset_helper_backend/infra/nginx/nginx.conf

@@ -0,0 +1,49 @@
+# Nginx 配置文件
+
+user nginx;
+worker_processes auto;
+
+events {
+    worker_connections 1024;
+}
+
+http {
+    include /etc/nginx/mime.types;
+    default_type application/octet-stream;
+
+    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
+                      '$status $body_bytes_sent "$http_referer" '
+                      '"$http_user_agent" "$http_x_forwarded_for"';
+
+    access_log /var/log/nginx/access.log main;
+    error_log /var/log/nginx/error.log warn;
+
+    sendfile on;
+    keepalive_timeout 65;
+
+    upstream gateway {
+        server gateway:8000;
+    }
+
+    server {
+        listen 80;
+        server_name localhost;
+
+        location / {
+            proxy_pass http://gateway;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection 'upgrade';
+            proxy_set_header Host $host;
+            proxy_cache_bypass $http_upgrade;
+        }
+
+        location /ws {
+            proxy_pass http://gateway;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection "upgrade";
+            proxy_set_header Host $host;
+        }
+    }
+}

asset_helper_backend/infra/postgres/init.sql

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+-- 创建用户和数据库
+CREATE USER user_service WITH PASSWORD 'password';
+CREATE DATABASE user_db OWNER user_service;
+GRANT ALL PRIVILEGES ON DATABASE user_db TO user_service;
+
+-- 连接到 user_db 并创建表
+\c user_db;
+
+CREATE TABLE IF NOT EXISTS users (
+    id SERIAL PRIMARY KEY,
+    username VARCHAR(255) UNIQUE NOT NULL,
+    password_hash VARCHAR(255) NOT NULL,
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_users_username ON users(username);

asset_helper_backend/infra/redis/redis.conf

@@ -0,0 +1,21 @@
+# Redis 配置文件
+
+# 绑定地址
+bind 0.0.0.0
+
+# 端口
+port 6379
+
+# 数据持久化
+appendonly yes
+appendfsync everysec
+
+# 内存限制
+maxmemory 128mb
+maxmemory-policy allkeys-lru
+
+# 日志级别
+loglevel notice
+
+# 日志文件
+logfile "/var/log/redis/redis.log"