swaits
ad649be3d5
The As-built block records step 4 built after U0b, its two items and their tests; docs/testing.md names them and what P12 must mutate (the number exemption, the open/partial check, sends.is_empty(), the two day comparisons with their checked date arithmetic, the last-send max); docs/parity.md says sent tracking also feeds Needs attention.