docs(components): verification pass — fix cross-link targets, tag code fences, correct type names

- Fix 15 link-text/target mismatches (ConfigurationDatabase ×8 to Commons,
  NotificationOutbox ×4, ClusterInfrastructure case, HealthMonitoring,
  SiteCallAudit) caught by a link-text-vs-target consistency check.
- Tag 14 untagged code-fence openers (ASCII diagrams/trees, JSON, HTTP).
- Correct 4 type names to match source (ValidationService, HealthReportSender,
  CentralCommunicationActor, DebugSnapshotCommand set).
- Soften Traefik version prose per the style guide.

docs/components/TemplateEngine.md

@@ -112,7 +112,7 @@ Template edits use **last-write-wins** — there is no optimistic concurrency to
 
 ### Service map
 
-```
+```text
 AddTemplateEngine()
 ├── TemplateService        (scoped)  — template + member CRUD, collision/acyclicity pre-checks
 ├── SharedScriptService    (scoped)  — system-wide shared script CRUD + syntax validation