A single range touched by a concentrated-liquidity trade.
The contract joins one entry per range into the trade event's ranges
attribute with commas. Each entry is colon-separated. The leading segment is
the range id, which itself embeds the price bounds as idx:low-high, so a
full entry has the shape:
- base-side fill:
idx:low-high:base:quote:deduct:add::fee(7th slot empty) - quote-side fill:
idx:low-high:base:quote:deduct:add:fee:(8th slot empty)
All amounts and bounds are the range's internal full-precision Decimal
values, not 8-decimal token integers.