P9.3: wiki/Home.md following 14-section visual-first template + wiki:* scripts

Auto-generated topic-contract + data-model sections via shared wikiGen
script. Hand-written Mermaid diagrams for position-in-platform, code
map, child registration, lifecycle, configuration, state chart (where
applicable).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

wiki/_partial-datamodel.md.template

@@ -0,0 +1,18 @@
+No domain output. dashboardAPI emits **HTTP request envelopes on Port 0**, shaped for a downstream `http request` node:
+
+```js
+{
+  topic: 'create',
+  url: 'http://<grafana>:<port>/api/dashboards/db',
+  method: 'POST',
+  headers: {
+    Accept: 'application/json',
+    'Content-Type': 'application/json',
+    Authorization: 'Bearer …'   // only when bearerToken is set
+  },
+  payload: { dashboard: {…}, folderId: 0, overwrite: true },
+  meta: { nodeId, softwareType, uid, title }
+}
+```
+
+Port 1 (InfluxDB telemetry) and Port 2 (registration / control plumbing) are unused — dashboardAPI has no measurements and does not register with a parent.