add migration & enhance int-test

models/forgejo_migrations/v17.go

@@ -0,0 +1,14 @@
+// Copyright 2024 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package forgejo_migrations //nolint:revive
+
+import "xorm.io/xorm"
+
+func AddNormalizedFederatedURIToUser(x *xorm.Engine) error {
+	type User struct {
+		ID                     int64 `xorm:"pk autoincr"`
+		NormalizedFederatedURI string
+	}
+	return x.Sync(&User{})
+}