feat: add retry loop for tool registration at startup

dap-was-lib/src/main/java/io/shinhanlife/dap/lib/mcp/ToolRegistryHeartbeatSender.java

@@ -234,9 +234,11 @@ public class ToolRegistryHeartbeatSender {
     public void registerAllTools() {
         if (registeredTools.isEmpty()) return;
 
-        for (ToolMetadata tool : registeredTools) {
+        new Thread(() -> {
-            registerTool(tool);
+            for (ToolMetadata tool : registeredTools) {
-        }
+                registerTool(tool);
+            }
+        }, "McpToolRegistrationThread").start();
     }
 
     @PreDestroy
@@ -259,17 +261,31 @@ public class ToolRegistryHeartbeatSender {
     }
 
     private void registerTool(ToolMetadata tool) {
-        try {
+        int maxRetries = 12;
-            restClient.post()
+        int delayMs = 10000;
-                    .uri(gatewayUrl + "/mcp/api/v1/registry/register")
+        for (int i = 0; i < maxRetries; i++) {
-                    .header("Content-Type", "application/json")
+            try {
-                    
+                restClient.post()
-                    .body(tool)
+                        .uri(gatewayUrl + "/mcp/api/v1/registry/register")
-                    .retrieve()
+                        .header("Content-Type", "application/json")
-                    .toBodilessEntity();
+                        .body(tool)
-            log.info(" [HeartbeatSender] 툴 재등록 성공: {}", tool.getUid());
+                        .retrieve()
-        } catch (Exception ex) {
+                        .toBodilessEntity();
-            log.error(" [HeartbeatSender] 툴 등록 실패: {}", ex.getMessage());
+                log.info(" [HeartbeatSender] 툴 등록 성공: {}", tool.getUid());
+                return;
+            } catch (Exception ex) {
+                if (i == maxRetries - 1) {
+                    log.error(" [HeartbeatSender] 툴 등록 최종 실패 ({}회 재시도): {}", maxRetries, ex.getMessage());
+                } else {
+                    log.warn(" [HeartbeatSender] 툴 등록 실패, {}초 후 재시도... ({}/{}): {}", delayMs/1000, i+1, maxRetries, ex.getMessage());
+                    try {
+                        Thread.sleep(delayMs);
+                    } catch (InterruptedException ie) {
+                        Thread.currentThread().interrupt();
+                        break;
+                    }
+                }
+            }
         }
     }
 }