优化

integration-service/src/main/java/com/baiyue/integration/security/InternalServiceTokenGuard.java

@@ -12,13 +12,19 @@ import java.security.MessageDigest;
 
 @Component
 public class InternalServiceTokenGuard {
+    private static final String INSECURE_PLACEHOLDER =
+            "change-me-to-an-internal-token-at-least-32-bytes-long";
+
     @Value("${baiyue.security.internal-service-token}") private String token;
     private byte[] expectedToken;
 
     @PostConstruct
     void initializeToken() {
-        if (token == null || token.getBytes(StandardCharsets.UTF_8).length < 32) {
-            throw new IllegalStateException("INTERNAL_SERVICE_TOKEN 至少需要 32 字节");
+        if (token == null
+                || token.isBlank()
+                || INSECURE_PLACEHOLDER.equals(token)
+                || token.getBytes(StandardCharsets.UTF_8).length < 32) {
+            throw new IllegalStateException("INTERNAL_SERVICE_TOKEN 必须配置为至少 32 字节的安全令牌");
         }
         this.expectedToken = token.getBytes(StandardCharsets.UTF_8);
     }