pub const J1_CSV: &str = "\r\nTransactions\r\nUser,00000000-0000-0000-0000-000000000000\r\n\
ID,Timestamp,Transaction Type,Asset,Quantity Transacted,Price Currency,Price at Transaction,Subtotal,Total (inclusive of fees and/or spread),Fees and/or Spread,Notes,Sender Address,Recipient Address\r\n\
cb-buy,2025-03-01 12:00:00 UTC,Buy,BTC,0.10000000,USD,84000.00,8400.00,8450.00,50.00,,,\r\n\
cb-sell,2025-06-15 12:00:00 UTC,Sell,BTC,0.02000000,USD,67500.00,1350.00,1340.00,10.00,,,\r\n";Expand description
J1 corpus: a single-buyer happy path — one Buy + one partial Sell in 2025.