Fix MCP Generator objectmapper (#1102)

Author: germanosin

api/src/main/java/io/kafbat/ui/service/mcp/McpSpecificationGenerator.java

@@ -35,7 +35,7 @@
 @RequiredArgsConstructor
 public class McpSpecificationGenerator {
   private final SchemaGenerator schemaGenerator;
-  private final ObjectMapper objectMapper = new ObjectMapper();
+  private final ObjectMapper objectMapper;
 
   public List<AsyncToolSpecification> convertTool(McpTool controller) {
     List<AsyncToolSpecification> result = new ArrayList<>();

api/src/test/java/io/kafbat/ui/service/mcp/McpSpecificationGeneratorTest.java

@@ -24,7 +24,7 @@
 class McpSpecificationGeneratorTest {
   private static final SchemaGenerator SCHEMA_GENERATOR = schemaGenerator();
   private static final McpSpecificationGenerator MCP_SPECIFICATION_GENERATOR =
-      new McpSpecificationGenerator(SCHEMA_GENERATOR);
+      new McpSpecificationGenerator(SCHEMA_GENERATOR, new ObjectMapper());
 
   private static SchemaGenerator schemaGenerator() {
     SchemaGeneratorConfigBuilder configBuilder =