The export now includes the full participantExpectedValues records
(placement probabilities, source, sourceOdds) alongside participants.
On import, EV records are upserted in merge mode and created fresh in
replace mode (cascade handles cleanup). Backward-compatible with older
exports that lack the participantExpectedValues field.
https://claude.ai/code/session_01TVzuuDR7jPtmihaXTrsX7B