Member of multisig group cannot create end role authorization

[lenkan]

There is a bug when a group is created but one of the members joins after an event has been generated by the other members.

Affected versions:

• main as of 2024-10-11
• 0.2.0-dev3
• Probably before as well

Steps to reproduce

1. Member 1 and 2 creates group consisting of member 1, 2, and 3
2. Member 1 and 2 authorizes the end role for the agent of member 1
3. Member 3 creates the group
4. Member 3 authorizes the end role for the agent of member 1

Expected result

Member 3 completes the authorization and the end role is saved in the database.

Actual result

Member 3 is unable to complete the authorization.

Notes

Reproduction script using signify-ts is here: https://github.com/nordlei/vlei-sandbox/blob/main/src/issues/multisig-join-late-add-agents.test.ts