Signed test candidate sets for quattro-upstream 5c09dc82c, b15975d62 and 9d8c39cd7 (convention previews)

[maralcbr]

Records the manifests and signing receipts of two test candidate sets. Data only; no code changes.

• apple-test-5c09dc82c1c1-20260928: omarchy, omarchy-settings, omarchy-mac (0.1.0-7, Pin omarchy-mac to the Apple setup it took over (0.1.0-7) omarchy-pkgs#672's recipe) and omarchy-mac-boot built from 5c09dc82c on the M1 Pro by the fork's lab lane. These are the archives both test Macs run now.
• apple-test-b15975d62f83-20260928: the same four from b15975d62 (adds Keep Mac install screens off external displays until the desktop #648), same recipes. The convention preview image is built from this set.
• Both keep the other 40 packages of the team preview set unchanged (linux-aurora 7.1.12.aurora2-11, m1n1-aurora 1.6.1.aurora1-3, uboot-asahi 2026.07.asahi2-4, limine-mkinitcpio-hook 1.39.0-2 and the closure). omarchy-mac 0.1.0-7's new depends (wf-recorder, widevine) come from ALARM and asahi-alarm.

Signed by test-lane key E11E851AF82E02AEF54C8794599A6024E3D35379; candidate-set sign verified all 44 packages of each and rejected a tampered copy.

Tested: image from the b15975d set (installer image-builder 0f54fb4, inspection passed, no GRUB, test pin kept); VM acceptance on the M1 Pro passed all eight scenarios (skips: audio sink in a VM, the snapshot restore step on the generic kernel). A first-boot run of the 5c09dc8 image also passed.

[maralcbr]

Added apple-test-9d8c39cd7182-20260928 (quattro-upstream 9d8c39c: adds #647 and #650), the source of convention preview 2. Image from installer main 0567717; inspection passed; VM acceptance on the M1 Pro passed conversion, second-boot and update.