feat(render): 实现渲染系统v2核心架构

- 添加v2支持的任务类型常量定义
- 更新软件版本至0.0.9
- 定义v2统一音视频编码参数
- 实现系统信息工具get_sys_info_v2方法
- 新增get_capabilities和_get_gpu_info功能
- 创建core模块及TaskHandler抽象基类
- 添加渲染系统设计文档包括集群架构、v2 PRD和Worker PRD
- 实现任务处理器抽象基类及接口规范

domain/config.py

@@ -0,0 +1,122 @@
+# -*- coding: utf-8 -*-
+"""
+Worker 配置模型
+
+定义 Worker 运行时的配置参数。
+"""
+
+import os
+from dataclasses import dataclass, field
+from typing import List, Optional
+
+
+# 默认支持的任务类型
+DEFAULT_CAPABILITIES = [
+    "RENDER_SEGMENT_VIDEO",
+    "PREPARE_JOB_AUDIO",
+    "PACKAGE_SEGMENT_TS",
+    "FINALIZE_MP4"
+]
+
+
+@dataclass
+class WorkerConfig:
+    """
+    Worker 配置
+
+    包含 Worker 运行所需的所有配置参数。
+    """
+    # API 配置
+    api_endpoint: str
+    access_key: str
+    worker_id: str
+
+    # 并发控制
+    max_concurrency: int = 4
+
+    # 心跳配置
+    heartbeat_interval: int = 5  # 秒
+
+    # 租约配置
+    lease_extension_threshold: int = 60  # 秒，提前多久续期
+    lease_extension_duration: int = 300  # 秒，每次续期时长
+
+    # 目录配置
+    temp_dir: str = "/tmp/render_worker"
+
+    # 能力配置
+    capabilities: List[str] = field(default_factory=lambda: DEFAULT_CAPABILITIES.copy())
+
+    # FFmpeg 配置
+    ffmpeg_timeout: int = 3600  # 秒，FFmpeg 执行超时
+
+    # 下载/上传配置
+    download_timeout: int = 300  # 秒，下载超时
+    upload_timeout: int = 600  # 秒，上传超时
+
+    @classmethod
+    def from_env(cls) -> 'WorkerConfig':
+        """从环境变量创建配置"""
+
+        # API 端点，优先使用 V2 版本
+        api_endpoint = os.getenv('API_ENDPOINT_V2') or os.getenv('API_ENDPOINT', '')
+        if not api_endpoint:
+            raise ValueError("API_ENDPOINT_V2 or API_ENDPOINT environment variable is required")
+
+        # Access Key
+        access_key = os.getenv('ACCESS_KEY', '')
+        if not access_key:
+            raise ValueError("ACCESS_KEY environment variable is required")
+
+        # Worker ID
+        worker_id = os.getenv('WORKER_ID', '100001')
+
+        # 并发数
+        max_concurrency = int(os.getenv('MAX_CONCURRENCY', '4'))
+
+        # 心跳间隔
+        heartbeat_interval = int(os.getenv('HEARTBEAT_INTERVAL', '5'))
+
+        # 租约配置
+        lease_extension_threshold = int(os.getenv('LEASE_EXTENSION_THRESHOLD', '60'))
+        lease_extension_duration = int(os.getenv('LEASE_EXTENSION_DURATION', '300'))
+
+        # 临时目录
+        temp_dir = os.getenv('TEMP_DIR', os.getenv('TEMP', '/tmp/render_worker'))
+
+        # 能力列表
+        capabilities_str = os.getenv('CAPABILITIES', '')
+        if capabilities_str:
+            capabilities = [c.strip() for c in capabilities_str.split(',') if c.strip()]
+        else:
+            capabilities = DEFAULT_CAPABILITIES.copy()
+
+        # FFmpeg 超时
+        ffmpeg_timeout = int(os.getenv('FFMPEG_TIMEOUT', '3600'))
+
+        # 下载/上传超时
+        download_timeout = int(os.getenv('DOWNLOAD_TIMEOUT', '300'))
+        upload_timeout = int(os.getenv('UPLOAD_TIMEOUT', '600'))
+
+        return cls(
+            api_endpoint=api_endpoint,
+            access_key=access_key,
+            worker_id=worker_id,
+            max_concurrency=max_concurrency,
+            heartbeat_interval=heartbeat_interval,
+            lease_extension_threshold=lease_extension_threshold,
+            lease_extension_duration=lease_extension_duration,
+            temp_dir=temp_dir,
+            capabilities=capabilities,
+            ffmpeg_timeout=ffmpeg_timeout,
+            download_timeout=download_timeout,
+            upload_timeout=upload_timeout
+        )
+
+    def get_work_dir_path(self, task_id: str) -> str:
+        """获取任务工作目录路径"""
+        return os.path.join(self.temp_dir, f"task_{task_id}")
+
+    def ensure_temp_dir(self) -> None:
+        """确保临时目录存在"""
+        os.makedirs(self.temp_dir, exist_ok=True)