feat（新功能）: 新增 骨架/图片+prompt/首尾帧+prompt -> 视频接口

fix（修复bug）:
docs（文档变更）:
refactor（重构）:
test(增加测试):

app/schemas/comfyui_i2v.py

@@ -0,0 +1,23 @@
+from pydantic import BaseModel
+
+
+class ComfyuiPose2VModel(BaseModel):
+    # 骨架生成视频
+    image_url: str
+    tasks_id: str
+    pose_id: str
+
+
+class ComfyuiI2VModel(BaseModel):
+    # 图生视频
+    image_url: str
+    prompt: str
+    tasks_id: str
+
+
+class ComfyuiFLF2VModel(BaseModel):
+    # 首尾帧生视频
+    start_image_url: str
+    end_image_url: str
+    prompt: str
+    tasks_id: str