fix: remove _zh_CN suffix from messages basename, add graceful shutdown drain

- messages basename: drop _zh_CN suffix (Spring auto-appends locale),
  eliminating repeated ResourceBundle WARN during every request
- OrganizationServer: add @EventListener(ContextClosedEvent)
  with 30s drain delay to let in-flight requests complete
  before bean destruction begins

backend/ninca-common-component-organization/cwos-component-organization-starter/src/main/java/cn/cloudwalk/starter/organization/OrganizationServer.java

@@ -21,6 +21,9 @@ import org.springframework.cloud.netflix.hystrix.EnableHystrix;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.EnableAspectJAutoProxy;
+import org.springframework.context.event.ContextClosedEvent;
+import org.springframework.context.event.EventListener;
+import org.springframework.core.annotation.Order;
 import org.springframework.data.redis.core.StringRedisTemplate;
 import org.springframework.http.HttpMethod;
 import org.springframework.http.client.ClientHttpRequestFactory;
@@ -63,7 +66,20 @@ implements WebApplicationInitializer {
             protected HttpUriRequest createHttpUriRequest(HttpMethod httpMethod, URI uri) {
                 if (HttpMethod.DELETE == httpMethod) {
                     return new VMSHttpEntityEnclosingRequestBase(uri);
-                }
+    @EventListener
+    @Order(0)
+    public void onShutdown(ContextClosedEvent event) {
+        log.info("Graceful shutdown: draining in-flight requests ({}ms)...", SHUTDOWN_DRAIN_MS);
+        try {
+            Thread.sleep(SHUTDOWN_DRAIN_MS);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+        }
+        log.info("Graceful shutdown: drain complete");
+    }
+
+    private static final long SHUTDOWN_DRAIN_MS = 30_000L;
+}
                 return super.createHttpUriRequest(httpMethod, uri);
             }
         });