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/manifest.json

@@ -0,0 +1,79 @@
+{
+  "id": "webhook-notifier",
+  "title": "Webhook Notifier",
+  "type": "workflow",
+  "version": "0.1.0",
+  "tier": "starlark",
+  "icon": "🔔",
+  "author": "Switchboard Core",
+  "description": "Outbound webhook delivery with connection credential support and delivery logging.",
+  "permissions": ["api.http", "connections.read", "db.write"],
+
+  "db_tables": {
+    "webhook_log": {
+      "columns": {
+        "url": "text",
+        "status_code": "text",
+        "event": "text",
+        "instance_id": "text"
+      }
+    }
+  },
+
+  "workflow_definition": {
+    "name": "Webhook Notifier",
+    "slug": "webhook-notifier",
+    "entry_mode": "team_only",
+    "stages": [
+      {
+        "name": "configure",
+        "ordinal": 0,
+        "stage_mode": "form",
+        "audience": "team",
+        "stage_type": "simple",
+        "auto_transition": false,
+        "form_template": {
+          "fieldsets": [
+            {
+              "label": "Webhook Configuration",
+              "fields": [
+                { "key": "webhook_url", "label": "Webhook URL", "type": "text", "required": true },
+                { "key": "event_name", "label": "Event Name", "type": "text", "required": true },
+                { "key": "payload", "label": "Custom Payload (JSON)", "type": "textarea" }
+              ]
+            }
+          ]
+        }
+      },
+      {
+        "name": "fire-webhook",
+        "ordinal": 1,
+        "stage_mode": "automated",
+        "audience": "system",
+        "stage_type": "automated",
+        "auto_transition": true,
+        "starlark_hook": "webhook-notifier:on_fire"
+      },
+      {
+        "name": "result",
+        "ordinal": 2,
+        "stage_mode": "review",
+        "audience": "team",
+        "stage_type": "simple",
+        "auto_transition": false,
+        "form_template": {
+          "fieldsets": [
+            {
+              "label": "Delivery Result",
+              "fields": [
+                { "key": "delivery_status", "label": "Status", "type": "text" },
+                { "key": "status_code", "label": "HTTP Status Code", "type": "text" },
+                { "key": "response_body", "label": "Response", "type": "textarea" }
+              ]
+            }
+          ]
+        }
+      }
+    ]
+  }
+}