feat(重构): 实现新的渲染服务架构

- 新增 RenderTask

entity/effects/skip.py

@@ -0,0 +1,38 @@
+from typing import List
+from .base import EffectProcessor
+
+class SkipEffect(EffectProcessor):
+    """跳过开头效果处理器"""
+    
+    def validate_params(self) -> bool:
+        """验证参数：跳过的秒数"""
+        if not self.params:
+            return True  # 默认不跳过
+            
+        try:
+            skip_seconds = float(self.params)
+            return skip_seconds >= 0
+        except ValueError:
+            return False
+            
+    def generate_filter_args(self, video_input: str, effect_index: int) -> tuple[List[str], str]:
+        """生成跳过开头效果的滤镜参数"""
+        if not self.validate_params():
+            return [], video_input
+            
+        if not self.params:
+            return [], video_input
+            
+        skip_seconds = float(self.params)
+        if skip_seconds <= 0:
+            return [], video_input
+            
+        output_stream = f"[v_eff{effect_index}]"
+        
+        # 使用trim滤镜跳过开头
+        filter_args = [f"{video_input}trim=start={skip_seconds}{output_stream}"]
+        
+        return filter_args, output_stream
+        
+    def get_effect_name(self) -> str:
+        return "skip"