playbook: put uv/uvx on the irv-ml1-arbo runner PATH

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.

playbooks/arbo-runner-uv-symlink.yaml

@@ -0,0 +1,41 @@
+# Put `uv`/`uvx` on the irv-ml1-arbo Gitea Actions runner's PATH.
+#
+# WHY: the runner (`irv-ml1-arbo`, act_runner host-executor running AS lkraven
+# under systemd) inherits the bare systemd service PATH —
+#   /usr/local/bin:/usr/bin:/bin
+# — which does NOT include lkraven's `~/.local/bin` or `~/.cargo/bin`. uv is
+# installed at /home/lkraven/.local/bin/uv (login-shell only), so the CI step's
+# `uv run` failed with `uv: not found` even though uv is present on the box.
+# `/usr/local/bin` IS on the systemd PATH, so symlinking uv there makes it
+# visible to the runner. This also lets deploy.yml drop the per-run `curl|sh`
+# uv bootstrap. Operator-asked ("fix cicd"); comfy-dev (engine owner) authorized
+# the specific symlink 2026-06-16 (althing thread 01KV94VTS27B…).
+#
+# Re-apply this if the runner host is rebuilt or uv is reinstalled elsewhere.
+# Sudo because /usr/local/bin is root-owned; uv is owned by lkraven (the runner
+# identity), which is who actually executes the symlink at job time — traversal
+# of /home/lkraven works for lkraven, not for infra-ops (don't be fooled by an
+# infra-ops `env -i` exec test reporting Permission denied; that's the wrong
+# identity — verify AS lkraven).
+
+vars:
+  uv_src: /home/lkraven/.local/bin/uv
+  uvx_src: /home/lkraven/.local/bin/uvx
+
+steps:
+  - name: Symlink uv into /usr/local/bin (on the systemd PATH)
+    shell: ln -s {{ uv_src }} /usr/local/bin/uv
+    creates: /usr/local/bin/uv
+
+  - name: Symlink uvx into /usr/local/bin
+    shell: ln -s {{ uvx_src }} /usr/local/bin/uvx
+    creates: /usr/local/bin/uvx
+
+verify:
+  - name: uv resolves to the /usr/local/bin symlink under a systemd-like PATH (run AS lkraven)
+    shell: sudo -u lkraven env -i PATH=/usr/local/bin:/usr/bin:/bin sh -c 'command -v uv && uv --version'
+    changed_when: "false"
+
+  - name: uvx resolves the same way
+    shell: sudo -u lkraven env -i PATH=/usr/local/bin:/usr/bin:/bin sh -c 'command -v uvx && uvx --version'
+    changed_when: "false"