Connect proposal send signatures to Participants

[ilikesymmetry]

What's included in this pr + description

• anything related to "send" or "confirmAuthorship" has replaced roles with participants

[linear[bot]]

WEB-1069 Connect creation signature to participant from role

[vercel[bot]]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Updated
web	✅ Ready (Inspect)	Visit Preview	Dec 1, 2022 at 11:41PM (UTC)