chore(dev): mount ./ansible-dev as a local Ansible source at /srv/ansible

Dev convenience so you can author playbooks on the host and have Steward's
local-source discovery pick them up. ./ansible-dev/ is gitignored (operator
content); a safe demo playbook lives there locally.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitignore

@@ -54,3 +54,6 @@ playbook_cache/
 
 # Superpowers brainstorm scratch (visual companion mockups, state)
 .superpowers/
+
+# Local dev Ansible playbooks (operator content, mounted into the container)
+/ansible-dev/