feat: add Role (owner|admin) to the user domain, persistence model and mapper

internal/domain/user/userDomain.go

@@ -16,6 +16,13 @@ var ErrPasswordResetCodeExpired = errors.New("password reset code expired")
 var ErrInvalidDisplayName = errors.New("invalid display name")
 var ErrUsernameTaken = errors.New("username taken")
 
+type Role string
+
+const (
+	RoleOwner Role = "owner"
+	RoleAdmin Role = "admin"
+)
+
 type User struct {
 	ID                      uint32    `json:"id"`
 	Username                string    `json:"username"`
@@ -24,6 +31,7 @@ type User struct {
 	Email                   string    `json:"email"`
 	DisplayName             string    `json:"display_name"`
 	IsVerified              bool      `json:"is_verified"`
+	Role                    Role      `json:"role"`
 	VerificationCode        string    `json:"verification_code"`
 	VerificationExpiration  time.Time `json:"verification_expiration"`
 	PasswordResetExpiration time.Time `json:"password_reset_expiration"`