fix: prioritize domestic bridge endpoint

lastleg-service/src/main/java/com/baiyue/lastleg/client/EventBridgeClient.java

@@ -9,7 +9,7 @@ import org.springframework.web.bind.annotation.RequestHeader;
 
 /** 将海外业务 Outbox 投递到国内区域事件桥。 */
 @FeignClient(name = "event-bridge-service", contextId = "overseasContainerEventBridgeClient",
-    url = "${baiyue.firstleg.event-bridge-url:}")
+    url = "${CN_EVENT_BRIDGE_URL:${baiyue.firstleg.event-bridge-url:}}")
 public interface EventBridgeClient {
     @PostMapping("/internal/event-bridge/events")
     ApiResponse<Acknowledgement> receive(