refactor: update RestTemplate configuration in ClientConfig

- Modified the RestTemplate bean definition in ClientConfig to use RestTemplateBuilder for improved customization and configuration.
- Added UUID generation strategy to FoodMerchant entity for unique identifier management.
- Removed RestTemplate bean from UserApplication as it is now centralized in ClientConfig.

Author: XLCYun

ts-client-sdk/src/main/java/edu/fudan/common/client/config/ClientConfig.java

@@ -1,5 +1,6 @@
 package edu.fudan.common.client.config;
 
+import org.springframework.boot.web.client.RestTemplateBuilder;
 import org.springframework.cloud.client.loadbalancer.LoadBalanced;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -13,7 +14,7 @@ public class ClientConfig {
 
     @Bean
     @LoadBalanced
-    public RestTemplate restTemplate() {
-        return new RestTemplate();
+    public RestTemplate restTemplate(RestTemplateBuilder builder) {
+        return builder.build();
     }
 }

ts-food-merchant-service/src/main/java/food/entity/FoodMerchant.java

@@ -5,10 +5,16 @@
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
 import javax.persistence.Id;
-import javax.validation.constraints.NotNull;
-import java.util.UUID;
 
 @Entity
+@GenericGenerator(name = "jpa-uuid", strategy = "org.hibernate.id.UUIDGenerator")
 public class FoodMerchant {
-   
+	@Id
+	@GeneratedValue(generator = "jpa-uuid")
+	@Column(length = 36)
+	private String id;
+
+	public FoodMerchant() {
+		// Default constructor
+	}
 }

ts-user-service/src/main/java/user/UserApplication.java

@@ -2,15 +2,11 @@
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.boot.web.client.RestTemplateBuilder;
 import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
-import org.springframework.cloud.client.loadbalancer.LoadBalanced;
-import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.EnableAspectJAutoProxy;
 import org.springframework.integration.annotation.IntegrationComponentScan;
 import org.springframework.scheduling.annotation.EnableAsync;
-import org.springframework.web.client.RestTemplate;
 import springfox.documentation.swagger2.annotations.EnableSwagger2;
 
 /**
@@ -27,9 +23,4 @@ public class UserApplication {
     public static void main(String[] args) {
         SpringApplication.run(UserApplication.class, args);
     }
-    @LoadBalanced
-    @Bean
-    public RestTemplate restTemplate(RestTemplateBuilder builder) {
-        return builder.build();
-    }
 }