refactor: Replace inline fully qualified package names with proper imports

dap-gateway/src/main/java/io/shinhanlife/dap/biz/mcp/gateway/service/ExecuteService.java

@@ -1,5 +1,7 @@
 package io.shinhanlife.dap.biz.mcp.gateway.service;
 
+import java.util.HashMap;
+
 import io.shinhanlife.dap.biz.mcp.gateway.dto.ToolMetadata;
 import io.shinhanlife.dap.biz.mcp.gateway.resilience.FailureType;
 import io.shinhanlife.dap.biz.mcp.gateway.resilience.RetryPolicy;
@@ -219,9 +221,9 @@ public class ExecuteService {
                     LargeToolResponseService.Collector collector = largeResponses.newCollector(metadata.getName(), context.requestId());
 
                     while (true) {
-                        Map<String, Object> pagePayload = new java.util.HashMap<>(payload);
+                        Map<String, Object> pagePayload = new HashMap<>(payload);
                         if (pagePayload.containsKey("params")) {
-                            Map<String, Object> params = new java.util.HashMap<>((Map<String, Object>) pagePayload.get("params"));
+                            Map<String, Object> params = new HashMap<>((Map<String, Object>) pagePayload.get("params"));
                             params.put("arguments", objectMapper.convertValue(pageArguments, Map.class));
                             pagePayload.put("params", params);
                         } else {

dap-gateway/src/main/java/io/shinhanlife/dap/biz/mcp/gateway/sync/CustomWebMvcSseServerTransportProvider.java

@@ -1,5 +1,7 @@
 package io.shinhanlife.dap.biz.mcp.gateway.sync;
 
+import com.fasterxml.jackson.core.type.TypeReference;
+
 import com.fasterxml.jackson.databind.ObjectMapper;
 import io.modelcontextprotocol.json.TypeRef;
 import io.modelcontextprotocol.spec.McpSchema;
@@ -127,7 +129,7 @@ public class CustomWebMvcSseServerTransportProvider implements McpServerTranspor
         
         McpServerSession session = sessions.get(sessionId);
         try {
-            java.util.Map<String, Object> map = objectMapper.readValue(body, new com.fasterxml.jackson.core.type.TypeReference<java.util.Map<String, Object>>() {});
+            Map<String, Object> map = objectMapper.readValue(body, new TypeReference<Map<String, Object>>() {});
             io.modelcontextprotocol.spec.McpSchema.JSONRPCMessage message;
             
             if (map.containsKey("id")) {

dap-gateway/src/main/java/io/shinhanlife/dap/biz/mcp/gateway/sync/DynamicMcpController.java

@@ -1,5 +1,7 @@
 package io.shinhanlife.dap.biz.mcp.gateway.sync;
 
+import java.util.UUID;
+
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
@@ -72,7 +74,7 @@ public class DynamicMcpController {
 
         if (sessionId == null || sessionId.isEmpty()) {
             // 새 세션 생성 (initialize 요청)
-            String newSessionId = java.util.UUID.randomUUID().toString();
+            String newSessionId = UUID.randomUUID().toString();
             SseEmitter emitter = transport.handleCustomSse(newSessionId, body);
             
             return ResponseEntity.ok()

dap-gateway/src/main/java/io/shinhanlife/dap/biz/mcp/gateway/sync/DynamicMcpServerManager.java

@@ -1,5 +1,6 @@
 package io.shinhanlife.dap.biz.mcp.gateway.sync;
 
+import io.modelcontextprotocol.spec.McpSchema.ServerCapabilities;
 import io.modelcontextprotocol.server.McpServer;
 import io.modelcontextprotocol.server.McpSyncServer;
 import io.shinhanlife.dap.biz.mcp.gateway.dto.ToolMetadata;
@@ -51,7 +52,7 @@ public class DynamicMcpServerManager {
 
             McpSyncServer newServer = McpServer.sync(transport)
                 .serverInfo("DAP-Gateway-" + key, "1.0.0")
-                .capabilities(io.modelcontextprotocol.spec.McpSchema.ServerCapabilities.builder().tools(true).build())
+                .capabilities(ServerCapabilities.builder().tools(true).build())
                 .build();
                 
             categoryTransports.put(key, transport);

dap-gateway/src/main/java/io/shinhanlife/dap/biz/mcp/gateway/tool/large/AgentResponseBudgetService.java

@@ -1,5 +1,8 @@
 package io.shinhanlife.dap.biz.mcp.gateway.tool.large;
 
+import java.util.Iterator;
+import java.util.Map;
+
 import io.shinhanlife.dap.biz.mcp.gateway.config.AgentResponseBudgetProperties;
 import io.shinhanlife.dap.biz.mcp.gateway.guardrail.SensitiveDataMasker;
 import org.springframework.stereotype.Service;
@@ -99,9 +102,9 @@ public class AgentResponseBudgetService {
         int copied = 0;
         int originalFields = 0;
         
-        java.util.Iterator<java.util.Map.Entry<String, JsonNode>> fields = masked.fields();
+        Iterator<Map.Entry<String, JsonNode>> fields = masked.fields();
         while (fields.hasNext()) {
-            java.util.Map.Entry<String, JsonNode> entry = fields.next();
+            Map.Entry<String, JsonNode> entry = fields.next();
             originalFields++;
             if (copied >= properties.maxFieldsPerItem()) {
                 continue;
@@ -135,9 +138,9 @@ public class AgentResponseBudgetService {
         ObjectNode source = (ObjectNode) item;
         ObjectNode limited = json.createObjectNode();
         
-        java.util.Iterator<java.util.Map.Entry<String, JsonNode>> fields = source.fields();
+        Iterator<Map.Entry<String, JsonNode>> fields = source.fields();
         while (fields.hasNext()) {
-            java.util.Map.Entry<String, JsonNode> entry = fields.next();
+            Map.Entry<String, JsonNode> entry = fields.next();
             JsonNode value = entry.getValue();
             if (value.isTextual()) {
                 limited.put(entry.getKey(), truncateText(value.asText()));
@@ -164,7 +167,7 @@ public class AgentResponseBudgetService {
         fallback.put("maxItemBytes", properties.maxItemBytes());
         if (item.isObject()) {
             ArrayNode fieldNames = json.createArrayNode();
-            java.util.Iterator<String> fieldNamesIter = item.fieldNames();
+            Iterator<String> fieldNamesIter = item.fieldNames();
             while (fieldNamesIter.hasNext()) {
                 fieldNames.add(fieldNamesIter.next());
             }
@@ -188,9 +191,9 @@ public class AgentResponseBudgetService {
     private ObjectNode copyWithout(ObjectNode source, String... excludedFields) {
         ObjectNode copy = json.createObjectNode();
         
-        java.util.Iterator<java.util.Map.Entry<String, JsonNode>> fields = source.fields();
+        Iterator<Map.Entry<String, JsonNode>> fields = source.fields();
         while (fields.hasNext()) {
-            java.util.Map.Entry<String, JsonNode> entry = fields.next();
+            Map.Entry<String, JsonNode> entry = fields.next();
             if (!excluded(entry.getKey(), excludedFields)) {
                 copy.set(entry.getKey(), entry.getValue());
             }

dap-gateway/src/main/java/io/shinhanlife/dap/biz/mcp/gateway/tool/large/LargeToolResponseService.java

@@ -1,5 +1,7 @@
 package io.shinhanlife.dap.biz.mcp.gateway.tool.large;
 
+import java.util.Iterator;
+
 import io.shinhanlife.dap.biz.mcp.gateway.config.McpGatewayProperties;
 import io.shinhanlife.dap.biz.mcp.gateway.guardrail.SensitiveDataMasker;
 import io.shinhanlife.dap.biz.mcp.gateway.resilience.FailureType;
@@ -266,7 +268,7 @@ public class LargeToolResponseService {
             preview.put("maxItemBytes", properties.largeResponseMaxItemBytes());
             if (masked.isObject()) {
                 ArrayNode fieldNames = json.createArrayNode();
-                java.util.Iterator<String> fieldNamesIter = masked.fieldNames();
+                Iterator<String> fieldNamesIter = masked.fieldNames();
                 while (fieldNamesIter.hasNext()) {
                     fieldNames.add(fieldNamesIter.next());
                 }
@@ -309,7 +311,7 @@ public class LargeToolResponseService {
 
         private int count(JsonNode node) {
             int count = 0;
-            java.util.Iterator<JsonNode> iter = node.elements();
+            Iterator<JsonNode> iter = node.elements();
             while(iter.hasNext()) {
                 iter.next();
                 count++;