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/TraefikProxy.md

@@ -4,7 +4,7 @@ The Traefik Proxy is the reverse proxy and load balancer that fronts the central
 
 ## Overview
 
-The proxy runs as the `scadabridge-traefik` Docker container in the main compose stack (`docker/docker-compose.yml`). It is a third-party infrastructure component (Traefik v3.4) — there is no C# project for it. Its entire configuration is two YAML files mounted read-only into the container:
+The proxy runs as the `scadabridge-traefik` Docker container in the main compose stack (`docker/docker-compose.yml`). It is a third-party infrastructure component (Traefik; the image tag is pinned in `docker/docker-compose.yml`) — there is no C# project for it. Its entire configuration is two YAML files mounted read-only into the container:
 
 - `docker/traefik/traefik.yml` — static config: entrypoints, API dashboard, and file provider declaration.
 - `docker/traefik/dynamic.yml` — routing rules: the router that catches all traffic, the `central` load-balancer service listing both backend nodes, and the `/health/active` health-check settings.
@@ -47,13 +47,13 @@ When the active central node goes down, the Akka cluster's keep-oldest split-bra
 
 ### Docker topology
 
-```
+```text
   Clients (CLI, browser, external API)
           │
    host:9000 (HTTP)
           │
   ┌───────▼──────────────────┐
-  │  scadabridge-traefik      │  (Traefik v3.4 container)
+  │  scadabridge-traefik      │  (Traefik container)   
   │  entrypoint :80           │
   └──────┬──────────┬─────────┘
          │  /health/active poll (5s)