Maintenance: MemeCreateService - Replace fully qualified class names with proper imports (#113)

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>
Co-authored-by: Claude <[email protected]>

Author: 3 people

src/main/java/spring/memewikibe/application/MemeCreateService.java

@@ -4,6 +4,8 @@
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import org.springframework.transaction.support.TransactionSynchronization;
+import org.springframework.transaction.support.TransactionSynchronizationManager;
 import org.springframework.web.multipart.MultipartFile;
 import spring.memewikibe.api.controller.meme.request.MemeCreateRequest;
 import spring.memewikibe.common.util.HashtagParser;
@@ -60,14 +62,14 @@ public long createMeme(MemeCreateRequest request, MultipartFile imageFile) {
     }
 
     private void registerPostCommitIndexing(Meme meme) {
-        org.springframework.transaction.support.TransactionSynchronizationManager.registerSynchronization(
-            new org.springframework.transaction.support.TransactionSynchronization() {
+        TransactionSynchronizationManager.registerSynchronization(
+            new TransactionSynchronization() {
                 @Override
                 public void afterCommit() {
                     try {
                         vectorIndexService.index(meme);
                     } catch (Exception e) {
-                        log.warn("[afterCommit] Failed to index meme {} to Pinecone: {}", meme.getId(), e.toString());
+                        log.warn("[afterCommit] Failed to index meme {} to Pinecone: {}", meme.getId(), e.getMessage());
                     }
                 }
             }