delete unused column

record.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"log"
 	"strings"
+	"time"
 
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
@@ -11,8 +12,8 @@ import (
 )
 
 type Record struct {
-	gorm.Model
 	ID        uuid.UUID `gorm:"type:uuid"`
+	CreatedAt time.Time
 	Body      string
 	Response  string
 }