style: 忽略误报的编译警告, 调整内部字段访问权.

src/main/java/net/lamgc/oracle/sentry/common/logging/LevelRangeFilter.java

@@ -9,6 +9,7 @@ import ch.qos.logback.core.spi.FilterReply;
  * 级别范围过滤器.
  * @author LamGC
  */
+@SuppressWarnings("unused")
 public class LevelRangeFilter extends Filter<ILoggingEvent> {
 
     private Level maxLevel;

src/main/java/net/lamgc/oracle/sentry/common/logging/MarkerFilter.java

@@ -7,6 +7,7 @@ import ch.qos.logback.core.spi.FilterReply;
 /**
  * @author LamGC
  */
+@SuppressWarnings("unused")
 public class MarkerFilter extends Filter<ILoggingEvent> {
 
     private String markerName;

src/main/java/net/lamgc/oracle/sentry/script/ScriptLoggerFactory.java

@@ -19,7 +19,7 @@ import java.util.concurrent.ConcurrentHashMap;
  */
 public class ScriptLoggerFactory implements ScriptComponentFactory<Logger> {
 
-    public final static Marker SCRIPT_MARKER = MarkerFactory.getMarker("Script");
+    private final static Marker SCRIPT_MARKER = MarkerFactory.getMarker("Script");
 
     @Override
     public Logger getInstance(ScriptInfo info) {