refs #744: configure OCI IAM DDS context test

dds-backoffice/src/main/java/com/cloudhandson/ddsbackoffice/service/DdsMcpVectorSearchService.java

@@ -84,6 +84,8 @@ public class DdsMcpVectorSearchService {
         log.info("DDS vector query completed with {} rows", rows.size());
         return new DdsMcpVectorSearchResult(vector.query(), vector.embeddingMode(), rows.size(), List.copyOf(rows));
       } catch (java.sql.SQLException exception) {
+        log.warn("DDS vector query failed: sqlState={}, errorCode={}",
+            exception.getSQLState(), exception.getErrorCode());
         throw new AppException("DDS_QUERY_FAILED: DDS 보호 객체를 조회할 수 없습니다.");
       }
     });