feat(重构): 实现新的渲染服务架构

- 新增 RenderTask

util/exceptions.py

@@ -0,0 +1,72 @@
+class RenderWorkerError(Exception):
+    """RenderWorker基础异常类"""
+    def __init__(self, message: str, error_code: str = None):
+        super().__init__(message)
+        self.message = message
+        self.error_code = error_code or self.__class__.__name__
+
+class ConfigurationError(RenderWorkerError):
+    """配置错误"""
+    pass
+
+class TemplateError(RenderWorkerError):
+    """模板相关错误"""
+    pass
+
+class TemplateNotFoundError(TemplateError):
+    """模板未找到错误"""
+    pass
+
+class TemplateValidationError(TemplateError):
+    """模板验证错误"""
+    pass
+
+class TaskError(RenderWorkerError):
+    """任务处理错误"""
+    pass
+
+class TaskValidationError(TaskError):
+    """任务参数验证错误"""
+    pass
+
+class RenderError(RenderWorkerError):
+    """渲染处理错误"""
+    pass
+
+class FFmpegError(RenderError):
+    """FFmpeg执行错误"""
+    def __init__(self, message: str, command: list = None, return_code: int = None, stderr: str = None):
+        super().__init__(message)
+        self.command = command
+        self.return_code = return_code
+        self.stderr = stderr
+
+class EffectError(RenderError):
+    """效果处理错误"""
+    def __init__(self, message: str, effect_name: str = None, effect_params: str = None):
+        super().__init__(message)
+        self.effect_name = effect_name
+        self.effect_params = effect_params
+
+class StorageError(RenderWorkerError):
+    """存储相关错误"""
+    pass
+
+class APIError(RenderWorkerError):
+    """API调用错误"""
+    def __init__(self, message: str, status_code: int = None, response_body: str = None):
+        super().__init__(message)
+        self.status_code = status_code
+        self.response_body = response_body
+
+class ResourceError(RenderWorkerError):
+    """资源相关错误"""
+    pass
+
+class ResourceNotFoundError(ResourceError):
+    """资源未找到错误"""
+    pass
+
+class DownloadError(ResourceError):
+    """下载错误"""
+    pass