Each snapshot beside sum(amount) of the pair's landed rows up to its
observedAt, the gap, and the pair's previous unambiguous snapshot and gap.
gapSince is the first snapshot of the current run of equal gaps. .existing(): the
SQL is in 20261025184702_wallet_balance_divergence.sql.
Each snapshot beside
sum(amount)of the pair's landed rows up to itsobservedAt, the gap, and the pair's previous unambiguous snapshot and gap.gapSinceis the first snapshot of the current run of equal gaps..existing(): the SQL is in20261025184702_wallet_balance_divergence.sql.