feat（新功能）: sketch 多视角图生成功能接口

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

app/schemas/generate_image.py

@@ -1,6 +1,11 @@
 from pydantic import BaseModel
 
 
+class GenerateMultiViewModel(BaseModel):
+    tasks_id: str
+    image_url: str
+
+
 class GenerateImageModel(BaseModel):
     tasks_id: str
     prompt: str