refactor(server): adjust thread pool and timeout configurations

- Use underscore notation for better readability of numeric literals
- Set async timeout to 5 seconds for better request handling
- Configure server stop timeout to gracefully handle existing requests

Author: sharrlotte

build.gradle

@@ -45,7 +45,7 @@ dependencies{
     compileOnly files('lib/MindustryToolPluginLoader.jar')
     implementation 'com.fasterxml.jackson.core:jackson-databind:2.16.2'
 
-    implementation 'io.javalin:javalin:6.3.0'
+    implementation 'io.javalin:javalin:6.7.0'
     implementation 'com.github.ben-manes.caffeine:caffeine:2.9.3'
     implementation 'org.slf4j:slf4j-simple:2.0.16'
     implementation "org.reflections:reflections:0.10.2"

src/main/java/mindustrytool/handler/HttpServer.java

@@ -86,10 +86,13 @@ public void init() {
 
             int maxThreads = 20;
             int minThreads = 1;
-            int idleTimeoutMillis = 20000;
-
+            int idleTimeoutMillis = 20_000;
+            // to finish
+            config.http.asyncTimeout = 5_000;
             config.useVirtualThreads = true;
+
             config.jetty.threadPool = new QueuedThreadPool(maxThreads, minThreads, idleTimeoutMillis);
+            config.jetty.modifyServer(server -> server.setStopTimeout(5_000)); // wait 5 seconds for existing requests
 
             config.registerPlugin(new RouteOverviewPlugin());