feat(n8n-webhook): add approval-gated notification executor

skills/n8n-webhook/references/openclaw-action.md

@@ -14,6 +14,7 @@ It implements a real local OpenClaw → n8n router.
   - `append_log`
   - `get_logs`
   - `notify`
+  - `send_notification_draft`
   - `send_email_draft`
   - `create_calendar_event`
   - `approval_queue_add`
@@ -40,6 +41,13 @@ Example stored record:
 {"ts":"2026-03-12T07:00:00Z","source":"openclaw-action","request_id":"abc","text":"backup complete"}
 ```
 
+### `send_notification_draft`
+
+- queues an approval-gated notification proposal into workflow static data under key:
+  - `approvalQueue`
+- when resolved with `decision=approve`, it executes the existing `notify` path and sends through Telegram + Discord
+- uses only the already-configured notification credentials in the live n8n instance
+
 ### `send_email_draft` and `create_calendar_event`
 
 - queue approval-gated proposals into workflow static data under key:
@@ -129,6 +137,7 @@ After import, set this manually in n8n:
 
 - `assets/test-append-log.json`
 - `assets/test-notify.json`
+- `assets/test-send-notification-draft.json`
 - `assets/test-send-email-draft.json`
 - `assets/test-create-calendar-event.json`
 - `assets/test-fetch-and-normalize-url.json`
@@ -142,6 +151,7 @@ export N8N_WEBHOOK_SECRET='YOUR_SECRET_HERE'
 scripts/call-action.sh append_log --args '{"text":"backup complete"}' --pretty
 scripts/call-action.sh get_logs --args '{"limit":5}' --pretty
 scripts/call-action.sh notify --args '{"title":"Workflow finished","message":"n8n router test"}' --pretty
+scripts/call-action.sh send_notification_draft --args-file assets/test-send-notification-draft.json --pretty
 scripts/call-action.sh send_email_draft --args-file assets/test-send-email-draft.json --pretty
 scripts/call-action.sh create_calendar_event --args-file assets/test-create-calendar-event.json --pretty
 scripts/call-action.sh fetch_and_normalize_url --args '{"url":"http://192.168.153.113:18808/healthz"}' --pretty
@@ -152,6 +162,21 @@ scripts/call-action.sh inbound_event_filter --args-file assets/test-inbound-even
 
 ## Expected success examples
 
+### send_notification_draft
+
+```json
+{
+  "ok": true,
+  "request_id": "test-notify-draft-001",
+  "result": {
+    "action": "send_notification_draft",
+    "status": "queued_for_approval",
+    "pending_id": "approval-abc123",
+    "approval_status": "pending"
+  }
+}
+```
+
 ### send_email_draft
 
 ```json