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/templates/adr.md

@@ -0,0 +1,34 @@
+---
+id: ADR-0001
+type: decision
+status: active
+title: Short decision title
+created: YYYY-MM-DD
+updated: YYYY-MM-DD
+tags: []
+related: []
+source_paths: []
+confidence: confirmed
+---
+
+# ADR-0001 - Short Decision Title
+
+## Context
+
+TBD
+
+## Decision
+
+TBD
+
+## Alternatives Considered
+
+- TBD
+
+## Consequences
+
+- TBD
+
+## Related
+
+- TBD