feat(gotify-ws): 实现 SSH 连接信息解析和存储功能

- 新增 SSHConnection 结构体用于解析 Gotify 消息中的 SSH 连接信息
- 实现数据库连接和 SSH 连接信息存储功能
- 添加正则表达式匹配 IPv4 地址
- 移除不必要的测试代码和学生相关模型
- 优化项目结构，增加时间工具模块

packages/gotify-ws/Cargo.toml

@@ -18,4 +18,5 @@ serde_json = "1.0.142"
 tokio = { version = "1.47.1", features = ["full"] }
 tokio-tungstenite = { version = "0.27.0", features = ["native-tls"] }
 regex = "1.11.1"
-sea-orm = "1.1.14"
+sea-orm = { version = "1.1.14", features = ["sqlx-sqlite", "runtime-tokio-rustls", "macros"] }
+chrono = "0.4.41"