1、增加订单开发票功能和发票抬头添加功能

2、一个订单只能在一个开票里,不允许多开

video-gen-api/app/models/__init__.py

@@ -36,6 +36,7 @@ from app.models.user_oauth_account import UserOAuthAccount
 from app.models.user_oauth_app import UserOAuthApp
 from app.models.home_material import HomeMaterialAsset, HomeMaterialCategory, HomeMaterialWatermark
 from app.models.contact_request import ContactRequest
+from app.models.invoice import Invoice, InvoiceOrder
 from app.models.private_portrait import PrivatePortraitProject, PrivatePortraitValidateSession, PrivatePortraitAssetGroup, PrivatePortraitAsset
 from app.models.api import ApiKey, ApiGenerationTask, ApiUsageLog, ApiKeyUpscaleConfig, ApiUpscaleLink
 
@@ -57,4 +58,5 @@ __all__ = [
     "PrivatePortraitAssetGroup", "PrivatePortraitAsset",
     "ApiKey", "ApiGenerationTask", "ApiUsageLog", "ApiKeyUpscaleConfig", "ApiUpscaleLink",
     "ApiModelPricing",
+    "Invoice", "InvoiceOrder",
 ]