fix(readme): fix

README.md

@@ -392,64 +392,6 @@ classDiagram
         ERROR
         FATAL
     }
-
-    class LogRecord {
-        +String service_name
-        +DateTime timestamp
-        +LogLevel level
-        +String message
-        +String module
-        +Option<String> trace_id
-    }
-    %% 接口定义：强调 Send + Sync 约束
-    class LogOutput {
-        <<interface>>
-        <<Send + Sync>>
-        +write(record: LogRecord) Future
-    }
-
-    %% 具体实现
-    class PostgresOutput {
-        -PgPool pool
-        +write(record)
-    }
-    class ConsoleOutput {
-        +write(record)
-    }
-
-    %% 业务线程持有的 Logger (Producer)
-    class Logger {
-        <<Thread-Safe>>
-        <<Shared via Arc>>
-        -mpsc::Sender~LogRecord~ tx
-        -LogLevel min_level
-        +log(level, msg)
-    }
-
-    %% 后台异步任务 (Consumer)
-    class BackgroundWorker {
-        <<Active Object>>
-        <<Running in tokio::spawn>>
-        -mpsc::Receiver~LogRecord~ rx
-        -Vec~Box~LogOutput~~ outputs
-        +run()
-    }
-
-
-    %% 关系描述
-    LogOutput <|.. PostgresOutput
-    LogOutput <|.. ConsoleOutput
-    
-    %% 关键的线程安全机制：MPSC Channel
-    Logger "1" o-- "1" `mpsc::Sender` : Owns
-    BackgroundWorker "1" o-- "1" `mpsc::Receiver` : Owns
-    
-    %% 逻辑流
-    ClientThread ..> Logger : 1. Calls log() (Non-blocking)
-    Logger ..> `mpsc::Sender` : 2. Sends Record
-    `mpsc::Sender` ..> `mpsc::Receiver` : 3. Channel Transfer (Thread-Safe)
-    `mpsc::Receiver` ..> BackgroundWorker : 4. Receives Record
-    BackgroundWorker --> LogOutput : 5. Serialized Writes
 ```
 
 </details>