feat: 添加日志配置和Logback依赖

refactor: 重构实体类equals和hashCode方法

fix: 修复WebSocketService消息发送逻辑

style: 格式化代码和优化导入

docs: 更新JacksonConfig日期序列化格式

test: 添加CompanyFilePathTableCell测试类

chore: 清理无用代码和注释

client/src/main/resources/logback.xml

@@ -0,0 +1,22 @@
+<configuration>
+    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
+        </encoder>
+    </appender>
+    
+    <!-- 设置 com.ecep.contract 包下的日志级别为 DEBUG -->
+    <logger name="com.ecep.contract" level="DEBUG" additivity="false">
+        <appender-ref ref="CONSOLE" />
+    </logger>
+    
+    <!-- 特别设置 WebSocketService 类的日志级别为 DEBUG -->
+    <logger name="com.ecep.contract.WebSocketService" level="DEBUG" additivity="false">
+        <appender-ref ref="CONSOLE" />
+    </logger>
+    
+    <!-- 根日志配置 -->
+    <root level="INFO">
+        <appender-ref ref="CONSOLE" />
+    </root>
+</configuration>