v0.1.3

Documentation only; no behaviour change.

• skills/proc-lifecycle/SKILL.md no longer points at a checkout. It opened
  by locating proc at ~/repos/proc-warden/proc, symlinked to ~/bin/proc —
  both wrong for anyone else, and the skill is read on its own, away from the
  README, so an agent following it would look for a CLI that is not there. It now
  leads with pip install systemd-proc, names the PyPI/repo discrepancy at the
  point someone hits it, and keeps the checkout shim as an alternative.
• Dropped the claim that proc is "one stdlib-only Python file", which stopped
  being true when the CLI moved to src/proc_warden/cli.py. Zero runtime
  dependencies is the claim that matters and is still exact.
• README's clone instructions now use ~/.local/bin and create it first. On
  Debian and Ubuntu ~/.profile adds that directory to PATH only if it already
  exists, so without the mkdir -p the symlink fails and the directory would
  not be on PATH even once created.