Fix BillieJeanScheduled; strip trailing 0s in print_event; make H first; 256 slots.

[dpwe]

No description provided.

[github-actions]

🎛️ AMY HW CI (AMYboard bench)

Flashed this PR's AMY (LoadTestChord: 6-voice Juno patch=1, one held note every 2 s) onto the physical AMYboard and measured the smoothed render load as the chord grows — back-to-back with the same sketch built at the PR's merge base, so Δ is this PR's own cost.

✅ PASS — the bench ran the test to completion.

notes held	main @ d6292c5	this PR	Δ
1	1028	1034	+6
2	1185	1189	+4
3	1768	1781	+13
4	1950	1958	+8
5	2573	2600	+27
6	2767	2758	-9

Full chord settled render μs: 2761 (was 2769, Δ -0.3%) (peak 2767, 39 samples)

⬇️ Artifacts: serial log · load trace · report

_{Self-hosted bench (amyboardci). FAIL means only that the test could not run — the load values are informational, with no threshold and no audio compare. See tools/arduino_loadsweep/.}

[bwhitman]

⛓️ tulipcc integration PR opened

This merge was pinned into tulipcc for full-system CI: shorepine/tulipcc#1267

Test it there and merge that PR to move tulipcc onto this AMY.