Duplicate-Family Detection & Merge Tool

Nothing today flags when the same family gets entered twice (e.g., re-registering under a slightly different email, or two co-op staff creating the same family separately) — no matching logic and no merge tool exists. Competitors auto-flag by email/phone/name match and support a manual merge that resolves conflicting fees. Scope: a background match job on email/phone/name, a flagged-duplicates queue for directors, and a merge flow that lets them pick which record's data wins field by field, with fee/invoice history combined rather than lost.