refactor(configuration): use Duration for time interval configuration

Replace hardcoded millisecond values with Duration.ofSeconds() for better readability and maintainability of time-related configurations in server settings.

Author: codeboyzhou

src/main/java/com/github/thought2code/mcp/annotated/configuration/McpServerConfiguration.java

@@ -4,6 +4,7 @@
 import com.github.thought2code.mcp.annotated.enums.ServerMode;
 import com.github.thought2code.mcp.annotated.enums.ServerType;
 import com.github.thought2code.mcp.annotated.util.StringHelper;
+import java.time.Duration;
 
 /**
  * This record represents the configuration of an MCP (Model Context Protocol) server.
@@ -63,7 +64,7 @@ public static class Builder {
     private String instructions = StringHelper.EMPTY;
 
     /** The request timeout. */
-    private Long requestTimeout = 20000L;
+    private Long requestTimeout = Duration.ofSeconds(20).toMillis();
 
     /** The server capabilities. */
     private McpServerCapabilities capabilities = McpServerCapabilities.builder().build();

src/main/java/com/github/thought2code/mcp/annotated/configuration/McpServerStreamable.java

@@ -1,6 +1,7 @@
 package com.github.thought2code.mcp.annotated.configuration;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
+import java.time.Duration;
 
 /**
  * This record represents the streamable http server configuration for an MCP (Model Context
@@ -37,7 +38,7 @@ public static class Builder {
     private Boolean disallowDelete = false;
 
     /** The keep-alive interval. */
-    private Long keepAliveInterval = 0L;
+    private Long keepAliveInterval = Duration.ofSeconds(20).toMillis();
 
     /** The port. */
     private Integer port = 8080;