chore(ansible): use project-local uv venv for ansible runtime deps

Moves the local ansible runtime from a global `uv tool install ansible-core`
(which required remembering `--with kubernetes --with jmespath --with dnspython`)
to a project-managed venv described by `pyproject.toml` + `uv.lock`. Fixes the
"Failed to import the required Python library (kubernetes)" error on localhost.

The localhost inventory entry now derives `ansible_python_interpreter` from
`{{ ansible_playbook_python }}`, so `uv run ansible-playbook` is enough — no
more hardcoded user-specific paths.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

ansible/arcodange/factory/inventory/hosts.yml

@@ -30,6 +30,7 @@ local:
   hosts:
     localhost:
       ansible_connection: local
+      ansible_python_interpreter: "{{ ansible_playbook_python }}"
     pi1:
     pi2:
     pi3: