fix(test): NoticeApprovalClientTest 漏改 FLOWCENTER→FLOW_CENTER（D1 补漏）——test/notice/flow 包不在首轮扫描路径，CI testCompile 拦获

src/test/java/com/yunhai/notice/flow/NoticeApprovalClientTest.java

@@ -31,7 +31,7 @@ import static org.mockito.Mockito.when;
  */
 class NoticeApprovalClientTest {
 
-    private static final String TARGET = PlatformService.FLOWCENTER.key();
+    private static final String TARGET = PlatformService.FLOW_CENTER.key();
 
     private final NoticeFlowProperties properties = new NoticeFlowProperties();
     private YschOpenCall call;