Metadata for all users of a Jetstream team (incl. owner)

Hello. I'm currently building something with Jetstream, with Teams enabled.

I want to store additional data about team members, like a work_anniversary date. The team_user pivot table seems to be a good place to store such data but with the way Jetstream manages team, the team owner is not in this table.

It feels weird to have a work_anniversary column in the team_user table and a work_anniversary column in the teams table (the one for the team owner identified by user_id in this table).

How would you handle this? Just add the same column in the 2 different tables? Create another pivot table including the team owner? I don't think modifying the Jetstream architecture and trying to add the team owner in the team_user is a good idea since a lot of methods rely on the fact that the team owner is not present in this table.

Thank you for your input on this matter!