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/schema-migration.md

@@ -0,0 +1,40 @@
+---
+id: MIGRATION-YYYYMMDD
+type: schema-migration
+status: active
+title: Schema Migration YYYY-MM-DD
+created: YYYY-MM-DD
+updated: YYYY-MM-DD
+tags: [maintenance, schema-migration]
+related: []
+source_paths: []
+confidence: confirmed
+---
+
+# Schema Migration YYYY-MM-DD
+
+## Version Check
+
+- Previous schema version: TBD
+- Target schema version: 1.5.1
+- Migration needed: yes | no
+
+## Actions Applied
+
+- TBD
+
+## Actions Requiring User Confirmation
+
+- TBD
+
+## Legacy Items Detected
+
+- TBD
+
+## Files Changed
+
+- TBD
+
+## Result
+
+TBD