main: 扩展 Agent Run 调度与队列功能

- 增加 Agent Run MVP-0，包括 RunDispatcher 和 AgentRunJob
- 优化队列配置，支持 Redis 队列驱动，添加 Horizon 容器
- 更新 Docker 配置，细化角色分工，新增 Horizon 配置
- 增加测试任务 `TestJob`，扩展队列使用示例
- 更新 OpenAPI 规范，添加 Agent Run 相关接口及示例
- 编写文档，详细描述 Agent Run 流程与 MVP-0 功能
- 优化相关服务与文档，支持队列与异步运行

app/Services/Agent/HttpAgentProvider.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace App\Services\Agent;
+
+use Illuminate\Support\Facades\Http;
+
+class HttpAgentProvider implements AgentProviderInterface
+{
+    protected string $endpoint;
+
+    public function __construct(?string $endpoint = null)
+    {
+        $this->endpoint = $endpoint ?? config('services.agent_provider.endpoint', '');
+    }
+
+    /**
+     * @param array<string, mixed> $context
+     * @param array<string, mixed> $options
+     */
+    public function generate(array $context, array $options = []): string
+    {
+        if (empty($this->endpoint)) {
+            // placeholder to avoid accidental outbound calls when未配置
+            return (new DummyAgentProvider())->generate($context, $options);
+        }
+
+        $payload = [
+            'context' => $context,
+            'options' => $options,
+        ];
+
+        $response = Http::post($this->endpoint, $payload);
+
+        if (! $response->successful()) {
+            throw new \RuntimeException('Agent provider failed: '.$response->body());
+        }
+
+        $data = $response->json();
+
+        return is_string($data) ? $data : ($data['content'] ?? '');
+    }
+}