Contact merge: support merging more than two records in one flow

Context

From Apr 1, 2026 Attik Review. Merge today is pairwise; acquisitions and messy Spectora data can produce many duplicates for one person (10+ in extreme cases).

Ask

Allow merging 3+ contacts in a single flow (not only two at a time), without an unusably long scroll of duplicates.

Source

Roadmap item #4 — Apr 1, 2026 Attik Review – Feature Gaps & Bugs (Filtered)