rename dmc12 inventory to cloudlorean and vault admin_password

- replace inventory/dmc12.yml with cloudlorean.yml (+ group_vars) and update
  all README/AGENTS call examples and the inventory table
- move admin_password hash into encrypted vault.yml; remove plaintext copies
  from roles/bootstrap/defaults and group_vars/external.yml
- bootstrap.yml loads vault.yml via vars_files (same pattern as monitoring)
- monitoring: PSK config/registration updates, docker role defaults,
  os-updates logging/reboot refinements, ansible.cfg/execute.sh tweaks
- add .project-wiki knowledge base and .github agent instructions

.project-wiki/traceability/INDEX.md

@@ -0,0 +1,18 @@
+# Traceability
+
+This section connects requirements, changes, decisions, technical documentation, and source paths.
+
+## When To Read
+
+- Analyze implementation coverage or change impact.
+
+## Key Files
+
+- [Requirement map](./requirement-map.md)
+- [Requirement evidence](./requirement-evidence.yml)
+- [Change impact map](./change-impact-map.md)
+- [Code map](./code-map.md)
+
+## Placeholders Or Stale Areas
+
+- `change-impact-map.md` still placeholder (no change requests yet).