ci: verify the site-env publish step

[brainrake]

Stacked on supabase/postgres#2424. Do not merge.

Runs the site-env publish step of ami-release-nix.yml on push, to check that DEV_AWS_ROLE can write to supabase-public-artifacts-bucket. The key goes under nix-catalog/ci-test/<run id>-…. It does not write the latest-…sha pin.

🤖 Generated with Claude Code

[github-actions]

Package version diff

Compares built package versions in legacyPackages between this PR and the tip of the base branch, per system.

aarch64-linux: Closure size: 8 -> 8 (2 paths added, 2 paths removed, delta +0, disk usage -64B).

<<< /nix/store/0wq5gn32zfy4i57qc1rxnvmwmgfac0fl-site-env-15
>>> /nix/store/i73bvwsndayypfrgiikhaw648sjqbgj8-site-env-15
No version or selection state changes.
Closure size: 4 -> 4 (2 paths added, 2 paths removed, delta +0, disk usage -64B).
<<< /nix/store/swmbskrgld0034gg8aajjqra5qmg11r0-site-env-17
>>> /nix/store/aw91ld5hc7g8aa850ak87lww90z7wgal-site-env-17
No version or selection state changes.
Closure size: 8 -> 8 (2 paths added, 2 paths removed, delta +0, disk usage -64B).
<<< /nix/store/97l0wvvv59yx68hj83ffs5ly1b4q8c1j-site-env-orioledb-17
>>> /nix/store/c0k7v2cm73k3kmc9d85lnqlxidcsn907-site-env-orioledb-17
No version or selection state changes.
Closure size: 8 -> 8 (2 paths added, 2 paths removed, delta +0, disk usage -64B).

x86_64-linux: Closure size: 8 -> 8 (2 paths added, 2 paths removed, delta +0, disk usage -64B).

<<< /nix/store/mw6v05kvd0cdylgkh2xyj5nam5rdp42r-site-env-15
>>> /nix/store/x5z712hj8845rx33ly59ii5kikk3fdmk-site-env-15
No version or selection state changes.
Closure size: 4 -> 4 (2 paths added, 2 paths removed, delta +0, disk usage -64B).
<<< /nix/store/2bcn2ylap7fzd5ndzc1jnjc3hv7vi8yc-site-env-17
>>> /nix/store/79ablb7f84c7xpg5x5z5y1nmcf7w9ygq-site-env-17
No version or selection state changes.
Closure size: 8 -> 8 (2 paths added, 2 paths removed, delta +0, disk usage -64B).
<<< /nix/store/x2avvwn535pqgqxi3hpam0337rj87pg8-site-env-orioledb-17
>>> /nix/store/3lf94ygm3gf52sxbw8fnkvflfslj3q0l-site-env-orioledb-17
No version or selection state changes.
Closure size: 8 -> 8 (2 paths added, 2 paths removed, delta +0, disk usage -64B).