Fix NPE caused by PropertyName map with Mappings names

[radcortez]

To fix:

• https://github.com/quarkiverse/quarkus-langchain4j/actions/runs/12024209602/job/33519355974
• https://github.com/quarkiverse/quarkus-vault/actions/runs/12062907127/job/33637301283

[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit 837a603.

✅ The latest workflow run for the pull request has completed successfully.

It should be safe to merge provided you have a look at the other checks in the summary.

You can consult the Develocity build scans.

---

Flaky tests - Develocity

⚙️ JVM Tests - JDK 21

📦 extensions/smallrye-reactive-messaging-kafka/deployment

✖ io.quarkus.smallrye.reactivemessaging.kafka.deployment.testing.KafkaDevServicesContinuousTestingWorkingAppPropsTestCase.testContinuousTestingScenario3 - History

• expected: <1> but was: <0> - org.opentest4j.AssertionFailedError

org.opentest4j.AssertionFailedError: expected: <1> but was: <0>
	at org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:151)
	at org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:132)
	at org.junit.jupiter.api.AssertEquals.failNotEqual(AssertEquals.java:197)
	at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:166)
	at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:161)
	at org.junit.jupiter.api.Assertions.assertEquals(Assertions.java:632)
	at io.quarkus.smallrye.reactivemessaging.kafka.deployment.testing.KafkaDevServicesContinuousTestingWorkingAppPropsTestCase.testContinuousTestingScenario3(KafkaDevServicesContinuousTestingWorkingAppPropsTestCase.java:55)

[geoand]

Works great, thanks!