Apply suggestions from code review

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Signed-off-by: Joel Hanson <joelhanson025@gmail.com>

Author: Joel-hanson

src/main/java/com/ibm/eventstreams/connect/mqsource/builders/BaseRecordBuilder.java

@@ -330,7 +330,7 @@ private SourceRecord handleBuildException(final Message message, final Map<Strin
             final Exception exception) {
 
         // If errors are tolerated but no DLQ is configured, skip the message
-        if (dlqTopic == null) {
+        if (dlqTopic == null || dlqTopic.isEmpty()) {
             log.debug(
                     "Skipping message due to conversion error: error tolerance is enabled but DLQ is not configured. Message will not be processed further.");
             return null;
@@ -425,7 +425,7 @@ private Optional<byte[]> extractPayload(final Message message) {
      * @param message       The orginal message
      *
      * @param originalTopic The original topic name
-     * @param exception     The execption that needs to be included in the header
+     * @param exception     The exception that needs to be included in the header
      *
      * @return Headers
      */