feat(config, email_service, telegram_bot): Add dynamic GPTMail API key management and config reload capability

- Add reload_config() function to dynamically reload config.toml and team.json without restart
- Implement GPTMail API key management with support for multiple keys (api_keys list)
- Add functions to manage GPTMail keys: get_gptmail_keys(), add_gptmail_key(), remove_gptmail_key()
- Add key rotation strategies: get_next_gptmail_key() (round-robin) and get_random_gptmail_key()
- Add gptmail_keys.json file support for dynamic key management
- Fix config parsing to handle include_team_owners and proxy settings in multiple locations
- Update email_service.py to use key rotation for GPTMail API calls
- Update telegram_bot.py to support dynamic key management
- Add install_service.sh script for service installation
- Update config.toml.example with new api_keys configuration option
- Improve configuration flexibility by supporting both old (api_key) and new (api_keys) formats

config.toml.example

@@ -8,6 +8,42 @@
 #   - "gptmail": GPTMail 临时邮箱系统，无需创建用户，直接生成即可收信
 email_provider = "gptmail"
 
+# ==================== 授权服务选择 ====================
+# 选择使用的授权服务: "crs" / "cpa" / "s2a"
+#   - crs: 原有 CRS 系统，需手动添加账号到 CRS
+#   - cpa: CPA (Codex/Copilot Authorization) 系统，后台自动处理账号
+#   - s2a: Sub2API 系统，支持 OAuth 授权和账号入库
+auth_provider = "cpa"
+
+# 是否将 team.json 中的 Team Owner 也添加到授权服务
+# 开启后，运行时会自动将 team.json 中的 Owner 账号也进行授权入库
+# 注意: 请确保 Team Owner 邮箱可以接收验证码
+include_team_owners = false
+
+# ==================== 代理配置 ====================
+# 是否启用代理 (默认关闭)
+proxy_enabled = false
+
+# 支持配置多个代理，程序会轮换使用
+# type: 代理类型 (socks5/http/https)
+# host: 代理服务器地址
+# port: 代理端口
+# username/password: 代理认证信息 (可选)
+
+# [[proxies]]
+# type = "socks5"
+# host = "127.0.0.1"
+# port = 1080
+# username = ""
+# password = ""
+
+# [[proxies]]
+# type = "http"
+# host = "proxy.example.com"
+# port = 8080
+# username = "user"
+# password = "pass"
+
 # ---------- Cloud Mail 邮箱系统配置 ----------
 # 仅当 email_provider = "cloudmail" 时生效
 # 项目地址: https://github.com/maillab/cloud-mail
@@ -30,8 +66,16 @@ web_url = "https://your-email-service.com"
 [gptmail]
 # API 接口地址
 api_base = "https://mail.chatgpt.org.uk"
-# API 密钥 (gpt-test 为测试密钥，每日有调用限制)
+
+# API 密钥配置 (支持两种方式)
+# 方式1: 单个 Key (兼容旧配置)
 api_key = "gpt-test"
+
+# 方式2: 多个 Key 轮询 (推荐，可分散请求限制)
+# api_keys = ["key1", "key2", "key3"]
+
+# 注意: 也可以通过 Telegram Bot 的 /gptmail_add 命令动态添加 Key
+
 # 邮箱前缀 (留空则自动生成 {8位随机字符}-oaiteam 格式)
 prefix = ""
 # 可用域名列表，生成邮箱时随机选择
@@ -74,18 +118,6 @@ domains = [
     "zawauk.org", "zumuntahassociationuk.org"
 ]
 
-# ==================== 授权服务选择 ====================
-# 选择使用的授权服务: "crs" / "cpa" / "s2a"
-#   - crs: 原有 CRS 系统，需手动添加账号到 CRS
-#   - cpa: CPA (Codex/Copilot Authorization) 系统，后台自动处理账号
-#   - s2a: Sub2API 系统，支持 OAuth 授权和账号入库
-auth_provider = "cpa"
-
-# 是否将 team.json 中的 Team Owner 也添加到授权服务
-# 开启后，运行时会自动将 team.json 中的 Owner 账号也进行授权入库
-# 注意: 请确保 Team Owner 邮箱可以接收验证码
-include_team_owners = false
-
 # ==================== CRS 服务配置 ====================
 # CRS (Central Registration Service) 用于管理注册账号的中心服务
 [crs]
@@ -171,30 +203,6 @@ short_wait = 10
 # 无头模式 (服务器运行时设为 true)
 headless = false
 
-# ==================== 代理配置 ====================
-# 是否启用代理 (默认关闭)
-proxy_enabled = false
-
-# 支持配置多个代理，程序会轮换使用
-# type: 代理类型 (socks5/http/https)
-# host: 代理服务器地址
-# port: 代理端口
-# username/password: 代理认证信息 (可选)
-
-# [[proxies]]
-# type = "socks5"
-# host = "127.0.0.1"
-# port = 1080
-# username = ""
-# password = ""
-
-# [[proxies]]
-# type = "http"
-# host = "proxy.example.com"
-# port = 8080
-# username = "user"
-# password = "pass"
-
 # ==================== 文件配置 ====================
 [files]
 # 导出账号信息的 CSV 文件路径