add port and schema to federation host (#7203)

## Checklist

The [contributor guide](https://forgejo.org/docs/next/contributor/) contains information that will be helpful to first time contributors. There also are a few [conditions for merging Pull Requests in Forgejo repositories](https://codeberg.org/forgejo/governance/src/branch/main/PullRequestsAgreement.md). You are also welcome to join the [Forgejo development chatroom](https://matrix.to/#/#forgejo-development:matrix.org).

### Tests

- I added test coverage for Go changes...
  - [x] in their respective `*_test.go` for unit tests.
  - [ ] in the `tests/integration` directory if it involves interactions with a live Forgejo server.

### Documentation

- [ ] I created a pull request [to the documentation](https://codeberg.org/forgejo/docs) to explain to Forgejo users how to use this change.
- [ ] I did not document these changes and I do not expect someone else to do it.

### Release notes

- [ ] I do not want this change to show in the release notes.
- [ ] I want the title to show in the release notes with a link to this pull request.
- [ ] I want the content of the `release-notes/<pull request number>.md` to be be used for the release notes instead of the title.

Co-authored-by: Michael Jerger <michael.jerger@meissa-gmbh.de>
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/7203
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
Co-authored-by: zam <mirco.zachmann@meissa.de>
Co-committed-by: zam <mirco.zachmann@meissa.de>

models/user/user_repository.go

@@ -50,9 +50,7 @@ func CreateFederatedUser(ctx context.Context, user *User, federatedUser *Federat
 	return committer.Commit()
 }
 
-func FindFederatedUser(ctx context.Context, externalID string,
-	federationHostID int64,
-) (*User, *FederatedUser, error) {
+func FindFederatedUser(ctx context.Context, externalID string, federationHostID int64) (*User, *FederatedUser, error) {
 	federatedUser := new(FederatedUser)
 	user := new(User)
 	has, err := db.GetEngine(ctx).Where("external_id=? and federation_host_id=?", externalID, federationHostID).Get(federatedUser)
@@ -77,6 +75,32 @@ func FindFederatedUser(ctx context.Context, externalID string,
 	return user, federatedUser, nil
 }
 
+func FindFederatedUserByKeyID(ctx context.Context, keyID string) (*User, *FederatedUser, error) {
+	federatedUser := new(FederatedUser)
+	user := new(User)
+	has, err := db.GetEngine(ctx).Where("key_id=?", keyID).Get(federatedUser)
+	if err != nil {
+		return nil, nil, err
+	} else if !has {
+		return nil, nil, nil
+	}
+	has, err = db.GetEngine(ctx).ID(federatedUser.UserID).Get(user)
+	if err != nil {
+		return nil, nil, err
+	} else if !has {
+		return nil, nil, fmt.Errorf("User %v for federated user is missing", federatedUser.UserID)
+	}
+
+	if res, err := validation.IsValid(*user); !res {
+		return nil, nil, err
+	}
+	if res, err := validation.IsValid(*federatedUser); !res {
+		return nil, nil, err
+	}
+
+	return user, federatedUser, nil
+}
+
 func DeleteFederatedUser(ctx context.Context, userID int64) error {
 	_, err := db.GetEngine(ctx).Delete(&FederatedUser{UserID: userID})
 	return err