pub const J4_CSV: &str = "Date,Sent Amount,Sent Currency,Received Amount,Received Currency,Fee Amount,Tag\r\n\
2025-04-15 12:00:00 UTC,,,0.05000000,BTC,,income\r\n\
2025-05-20 12:00:00 UTC,,,0.03000000,BTC,,income\r\n";Expand description
J4 corpus: two River staking-income deposits in 2025 (FMV resolved from the bundled dataset).