`make test` is now the fast dev inner loop: no coverage, parallel
(--concurrency=12), ~21s warm (down from ~36s). Coverage moves to a new
`make test-coverage`, which push-check runs to feed coverage-gate. Drop the
separate test-a11y pass from push-check — the coverage run already executes
test/a11y. Both runs get --timeout 60s so a hung test fails fast instead of
wedging the runner ~10min and stalling the gate.
Measured: coverage is the floor (~36s) and concurrency-insensitive, so the
gate keeps coverage without --concurrency; only the no-coverage dev path
benefits from parallelism.
T-192.
Co-Authored-By: Claude <noreply@anthropic.com>
jpmschweitzerandClaude
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