Fix/add custom multisig

[AlexMCon]

Pull Request Template

Description

Please include a summary of the change and which issue is fixed. Additionally, please provide context necessary to understand why these changes were made and how they address the issue.

Fixes # (issue reference)

Type of Change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration.

Checklist:

Before submitting your pull request, please review the following checklist:

• I have performed a self-review of my own code.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• Any dependent changes have been merged and published in downstream modules.

Additional Information

Any additional information, configuration, or data that might be necessary to reproduce the issue or test the feature.

Screenshots (if appropriate)

[netlify]

✅ Deploy Preview for filplus-registry ready!

Name	Link
🔨 Latest commit	549de26
🔍 Latest deploy log	https://app.netlify.com/sites/filplus-registry/deploys/65cf37ec1b62690008d9af38
😎 Deploy Preview	https://deploy-preview-53--filplus-registry.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[clriesco]

LGTM