docs(azure): add @author and document metadata tests

- Add contributor name with @author tag to AzureVectorStore (per reviewer feedback).
- Add brief class-level Javadoc to AzureVectorStoreMetadataTests to clarify purpose.
- No functional changes.

Refs #4117.

Signed-off-by: Jinwoo Lee <[email protected]>

Author: jinlee1703

vector-stores/spring-ai-azure-store/src/main/java/org/springframework/ai/vectorstore/azure/AzureVectorStore.java

@@ -76,6 +76,7 @@
  * @author Josh Long
  * @author Thomas Vitale
  * @author Soby Chacko
+ * @author Jinwoo Lee
  */
 public class AzureVectorStore extends AbstractObservationVectorStore implements InitializingBean {
 

vector-stores/spring-ai-azure-store/src/test/java/org/springframework/ai/vectorstore/azure/AzureVectorStoreMetadataTests.java

@@ -6,6 +6,11 @@
 
 import org.junit.jupiter.api.Test;
 
+/**
+ * Unit tests for {@link AzureVectorStore#parseMetadataToMutable(String)}.
+ *
+ * @author Your Name
+ */
 class AzureVectorStoreMetadataTests {
 
 	@Test