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/requirements/INDEX.md

@@ -0,0 +1,20 @@
+# Requirements
+
+This section stores explicit product intent, constraints, and open questions.
+
+## When To Read
+
+- Understand confirmed project behavior, scope, constraints, or unresolved product intent.
+
+## Key Files
+
+- [Product brief](./product-brief.md)
+- [Functional requirements](./functional/INDEX.md)
+- [Non-functional requirements](./non-functional/INDEX.md)
+- [Constraints](./constraints.md)
+- [Open questions](./open-questions.md)
+
+## Placeholders Or Stale Areas
+
+- `product-brief.md` is still a placeholder (project identity lives in
+  [PROJECT.md](../PROJECT.md)); fill or remove during the next update.