#29498 Fix type casting issue in getFields method.

Updated the `getFields` method to handle instances where `PARAMETER_FIELDS` might be of type `ArrayList`. This prevents potential `ClassCastException` at runtime by checking the type before casting.

dotCMS/src/main/java/com/dotcms/jobs/business/processor/impl/ImportContentletsProcessor.java

@@ -42,6 +42,7 @@
 import java.io.Reader;
 import java.nio.charset.Charset;
 import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
 import java.util.Calendar;
 import java.util.Collections;
 import java.util.HashMap;
@@ -470,7 +471,12 @@ public String[] getFields(final Job job) {
             return new String[0];
         }
 
-        return (String[]) job.parameters().get(PARAMETER_FIELDS);
+        final var fields = job.parameters().get(PARAMETER_FIELDS);
+        if (fields instanceof ArrayList) {
+            return ((ArrayList<String>) fields).toArray(new String[0]);
+        }
+
+        return (String[]) fields;
     }
 
     /**