fix mock bug

internal/models/mock_position.go

@@ -1,6 +1,9 @@
 package models
 
-import "gorm.io/gorm"
+import (
+	"git.apinb.com/bsm-sdk/core/database"
+	"gorm.io/gorm"
+)
 
 type MockPosition struct {
 	gorm.Model
@@ -11,3 +14,9 @@ type MockPosition struct {
 	PnlRate    float64
 	Status     int `default:"0"`
 }
+
+func (m *MockPosition) TableName() string { return "mock_positions" }
+
+func init() {
+	database.AppendMigrate(&MockPosition{})
+}