fixed relationship issues

internal/db/permission.go

@@ -20,6 +20,8 @@ type Permission struct {
 	Action      string                 `bun:"action,notnull"`
 	IsSystem    bool                   `bun:"is_system,default:false"`
 	CreatedAt   int64                  `bun:"created_at,notnull"`
+
+	Roles []Role `bun:"m2m:role_permissions,join:Permission=Role"`
 }
 
 // GetPermissionByName queries the database for a permission matching the given name