Cannot exclude public scope with JavadocMethod module

checkstyle.xml
```

```
CheckstyleTest.java
```
package test;

public class CheckstyleTest {

public void publicMethod() {
System.out.println("public method");
}

protected void protectedMethod() {
System.out.println("protected method");
}

void packageMethod() {
System.out.println("package method");
}

private void privateMethod() {
System.out.println("private method");
}
}
```

Console
```
java -jar checkstyle-8.19-all.jar CheckstyleTest.java -c=checkstyle.xml

Starting audit...
Audit done.
```

---------------

Expected output:
```
Starting audit...
[WARN] TestProject\test\CheckstyleTest.java:9:9: Missing a Javadoc comment. [JavadocMethod]
[WARN] TestProject\test\CheckstyleTest.java:13:9: Missing a Javadoc comment. [JavadocMethod]
[WARN] TestProject\test\CheckstyleTest.java:17:9: Missing a Javadoc comment. [JavadocMethod]
Audit done.
```

--------------

Checkstyle seems to ignore the complete check if scope is set to public. Is this a bug?

Start by reproducing the configuration from checkstyle.xml against CheckstyleTest.java with the documented Checkstyle command. Trace how JavadocMethod handles excludeScope=public, then add a regression test covering public, protected, package, and private methods; done means the non-public methods produce the expected warnings while public methods remain excluded.

Written by the indexing model from the issue text.