Development record

TestTheStoredLineReadEndsWithItsContext (internal/gitutil/stored_each_test.go) required the stubbed git to have run exactly once. Its first read has a 300ms deadline, and on a loaded machine that deadline passed before the stub wrote its run marker, so the test counted 0 runs and failed a preflight whose change touched no gitutil code (fix/fork-approval-mirror, 2026-10-27).