修复log4net日志文件运行时不写入问题：rollingStyle改为Composite+staticLogFileName

src/CncCollector/log4net.config

@@ -11,10 +11,11 @@
   <appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
     <file value="logs\collector.log" />
     <appendToFile value="true" />
-    <rollingStyle value="Date" />
+    <rollingStyle value="Composite" />
     <datePattern value="yyyyMMdd" />
     <maxSizeRollBackups value="30" />
     <maximumFileSize value="10MB" />
+    <staticLogFileName value="true" />
     <layout type="log4net.Layout.PatternLayout">
       <conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />
     </layout>
@@ -24,10 +25,11 @@
   <appender name="ErrorFileAppender" type="log4net.Appender.RollingFileAppender">
     <file value="logs\collector_error.log" />
     <appendToFile value="true" />
-    <rollingStyle value="Date" />
+    <rollingStyle value="Composite" />
     <datePattern value="yyyyMMdd" />
     <maxSizeRollBackups value="30" />
     <maximumFileSize value="10MB" />
+    <staticLogFileName value="true" />
     <threshold value="ERROR" />
     <layout type="log4net.Layout.PatternLayout">
       <conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />