Same recipe as ci-full-build.yml (all 6 tools, Binaryen 130 from source,
pipelined wasm-opt, KiCad e2e) but on ubicloud-standard-30: a plain runs-on
label, so no create/delete-Hetzner-VM jobs and no shared one-slot concurrency
lock. Push-triggered ONLY on this branch (plus workflow_dispatch) so it never
competes with the Hetzner main CI.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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