Initial commit: arr-stack homelab + local AI

Docker Compose media stack (gluetun, *arr, Jellyfin), Ternary-Bonsai AI
(Open WebUI, Forgejo, optional OpenHands), and Ansible bootstrap for the
SER5 Ubuntu host.

ansible/ansible.cfg

@@ -0,0 +1,25 @@
+[defaults]
+inventory = inventory/hosts.ini
+roles_path = roles
+remote_user = tim
+private_key_file = ~/.ssh/id_ed25519
+host_key_checking = True
+retry_files_enabled = False
+# community.general.yaml was removed; use the built-in default callback's YAML format
+stdout_callback = ansible.builtin.default
+# (ansible-core 2.13+; ignored on older cores that don't know this key)
+callback_result_format = yaml
+interpreter_python = auto_silent
+deprecation_warnings = False
+# Faster on a single host
+forks = 5
+timeout = 30
+
+[privilege_escalation]
+# become is set per-play in site.yml (not global) so ad-hoc ping works without sudo
+become_method = sudo
+become_user = root
+
+[ssh_connection]
+pipelining = True
+ssh_args = -o ControlMaster=auto -o ControlPersist=60s -o StrictHostKeyChecking=accept-new