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/changes/CHANGELOG.md

@@ -0,0 +1,3 @@
+# Project Changelog
+
+No project changes have been captured yet.

.project-wiki/changes/INDEX.md

@@ -0,0 +1,17 @@
+# Changes
+
+This section preserves project changes, change requests, and architectural decisions.
+
+## When To Read
+
+- Review how requirements, scope, or technical direction changed over time.
+
+## Key Files
+
+- [Project changelog](./CHANGELOG.md)
+- [Change requests](./requests/)
+- [Architectural decisions](./decisions/)
+
+## Placeholders Or Stale Areas
+
+- No project changes or decisions have been captured yet.