The irv-ml1-arbo Gitea Actions runner (host-executor as lkraven under
systemd) gets the bare service PATH (/usr/local/bin:/usr/bin:/bin), which
omits ~/.local/bin — so the CI uv bootstrap failed with "uv: not found".
Symlink uv/uvx into /usr/local/bin (on the systemd PATH) to fix it and
retire the per-run curl|sh bootstrap. Idempotent (creates: guard);
re-applies cleanly after a runner rebuild. Authorized by comfy-dev
(engine owner) per althing thread 01KV94VTS27B.
