fix(spring): preserve RestClient customizers

Author: alejandroGM0

hiero-enterprise-spring/src/main/java/org/hiero/spring/implementation/ContractVerificationClientImplementation.java

@@ -38,10 +38,12 @@ private record VerifyRequest(
 
   private final RestClient restClient;
 
-  public ContractVerificationClientImplementation(@NonNull final HieroConfig hieroConfig) {
+  public ContractVerificationClientImplementation(
+      @NonNull final HieroConfig hieroConfig, final RestClient.Builder restClientBuilder) {
     this.hieroConfig = Objects.requireNonNull(hieroConfig, "hieroConfig must not be null");
     objectMapper = new ObjectMapper();
-    restClient = RestClient.create();
+    restClient =
+        Objects.requireNonNull(restClientBuilder, "restClientBuilder must not be null").build();
   }
 
   @NonNull

hiero-enterprise-spring/src/main/java/org/hiero/spring/implementation/HieroAutoConfiguration.java

@@ -39,6 +39,7 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.boot.autoconfigure.AutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
@@ -54,6 +55,11 @@ public class HieroAutoConfiguration {
 
   private static final Logger log = LoggerFactory.getLogger(HieroAutoConfiguration.class);
 
+  private RestClient.Builder restClientBuilder(
+      final ObjectProvider<RestClient.Builder> restClientBuilderProvider) {
+    return restClientBuilderProvider.getIfAvailable(RestClient::builder);
+  }
+
   @Bean
   @ApplicationScope
   HieroConfig hieroConfig(final HieroProperties properties) {
@@ -116,7 +122,9 @@ TopicClient topicClient(
       name = "mirrorNodeSupported",
       havingValue = "true",
       matchIfMissing = true)
-  MirrorNodeClient mirrorNodeClient(final HieroContext hieroContext) {
+  MirrorNodeClient mirrorNodeClient(
+      final HieroContext hieroContext,
+      final ObjectProvider<RestClient.Builder> restClientBuilderProvider) {
     final String mirrorNodeEndpoint;
     final List<String> mirrorNetwork = hieroContext.getClient().getMirrorNetwork();
     if (mirrorNetwork.isEmpty()) {
@@ -148,7 +156,8 @@ MirrorNodeClient mirrorNodeClient(final HieroContext hieroContext) {
       throw new IllegalArgumentException(
           "Error parsing mirrorNodeEndpoint '" + mirrorNodeEndpoint + "'", e);
     }
-    RestClient.Builder builder = RestClient.builder().baseUrl(baseUri);
+    RestClient.Builder builder =
+        restClientBuilder(restClientBuilderProvider).clone().baseUrl(baseUri);
     return new MirrorNodeClientImpl(builder);
   }
 
@@ -223,7 +232,10 @@ TopicRepository topicRepository(final MirrorNodeClient mirrorNodeClient) {
   }
 
   @Bean
-  ContractVerificationClient contractVerificationClient(final HieroConfig hieroConfig) {
-    return new ContractVerificationClientImplementation(hieroConfig);
+  ContractVerificationClient contractVerificationClient(
+      final HieroConfig hieroConfig,
+      final ObjectProvider<RestClient.Builder> restClientBuilderProvider) {
+    return new ContractVerificationClientImplementation(
+        hieroConfig, restClientBuilder(restClientBuilderProvider));
   }
 }