add event tracking and invite redemptoin

[sofieyang]

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Project	Deployment	Review	Updated (UTC)
abcresearch (devpreview)	Ready	Preview, Comment	Jan 6, 2026 11:01pm

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@sofieyang is attempting to deploy a commit to the fredrikwh-cs1060 team on Vercel, but is not a member of this team. To resolve this issue, you can:

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