Feat v0.3.6 demo workflows + interactive demo

Four example workflow packages proving the engine end-to-end:
- Bug Report Triage: public entry, branch routing, SLA timer
- Employee Onboarding: Starlark automated stages, signoff gate
- Content Approval: multi-party signoff, revision cycle loop
- Webhook Notifier: http.post, connections fallback, delivery logging

Demo surface at /s/workflow-demo with cards, stage diagrams, Starlark
viewer, API examples, active/published status, and copyable public links.

Engine fixes: started_by in automated context, sla_seconds in package
installer, parseSnapshotStages for wrapped/legacy formats.

Platform fixes: extension SDK boot in base.html (Preact globals + boot()),
admin teams paginated response extraction, workflow adoption endpoint
(POST /teams/:teamId/workflows/:id/adopt), team-admin copyable link.

Review pass remains on roadmap for remaining UI polish.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/webhook-notifier/script.star

@@ -0,0 +1,41 @@
+def on_fire(ctx):
+    """Fire outbound webhook with optional connection credentials."""
+    data = ctx["stage_data"]
+    url = data.get("webhook_url", "")
+
+    # Fallback to configured connection
+    if not url:
+        conn = connections.get("webhook")
+        if conn:
+            url = conn.get("url", "")
+
+    if not url:
+        return {"error": "No webhook URL configured"}
+
+    payload = json.encode({
+        "event": data.get("event_name", "workflow.notify"),
+        "instance_id": ctx["instance_id"],
+        "workflow_id": ctx["workflow_id"],
+        "data": data,
+    })
+
+    resp = http.post(url, body=payload, headers={
+        "Content-Type": "application/json",
+        "X-Switchboard-Event": data.get("event_name", "workflow.notify"),
+    })
+
+    # Log the delivery
+    db.insert("webhook_log", {
+        "url": url,
+        "status_code": str(resp["status"]),
+        "event": data.get("event_name", ""),
+        "instance_id": ctx["instance_id"],
+    })
+
+    status = "delivered" if int(resp["status"]) < 400 else "failed"
+
+    return {"advance": True, "data": {
+        "delivery_status": status,
+        "status_code": str(resp["status"]),
+        "response_body": resp["body"][:500],
+    }}