refactor: use MTP API

model/model.go

@@ -6,18 +6,11 @@ import (
 
 type ReceivedFile struct {
 	gorm.Model
-	// FileUniqueID 和 FileID 在数据库中均不具有唯一性
-	// 如需确定唯一一行, 使用 ChatID + MessageID
-	FileUniqueID   string `gorm:"index"`
-	FileID         string `gorm:"index"`
 	Processing     bool
 	FileName       string
-	FilePath       string
-	FileSize       int64
-	MediaGroupID   string
 	ChatID         int64
-	MessageID      int
-	ReplyMessageID int
+	MessageID      int32
+	ReplyMessageID int32
 }
 
 type User struct {