add port and schema to federation host (#7203)

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### 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

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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>

tests/integration/api_federation_httpsig_test.go

@@ -64,7 +64,7 @@ func TestFederationHttpSigValidation(t *testing.T) {
 			assert.NotNil(t, host)
 			assert.True(t, host.PublicKey.Valid)
 
-			user, err := user.GetFederatedUserByKeyID(db.DefaultContext, actorKeyID)
+			_, user, err := user.FindFederatedUserByKeyID(db.DefaultContext, actorKeyID)
 			require.NoError(t, err)
 			assert.NotNil(t, user)
 			assert.True(t, user.PublicKey.Valid)