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>

CHANGELOG.md

@@ -2,6 +2,47 @@
 
 All notable changes to Switchboard Core are documented here.
 
+## v0.3.6 — Example Workflows + Interactive Demo
+
+### Added
+
+- **Bug Report Triage** (`packages/bug-report-triage`): Public entry, progressive
+  fieldsets, severity-based branch routing, SLA timer (3600s on critical fix).
+- **Employee Onboarding** (`packages/employee-onboarding`): Starlark automated
+  stages (`db.insert`, `notifications.send`), manager signoff gate with
+  `required_role`, rejection reroute. `script.star` with `on_provision` and
+  `on_welcome` hooks. Creates `provisions` and `onboarding_log` ext_data tables.
+- **Content Approval** (`packages/content-approval`): Multi-party signoff (quorum
+  of 2), rejection reroute creating a review cycle loop.
+- **Webhook Notifier** (`packages/webhook-notifier`): Starlark `http.post` with
+  `connections.get` fallback, delivery logging to `webhook_log` ext_data table.
+- **Workflow Demo** surface (`packages/workflow-demo`): Interactive walkthrough
+  with workflow cards, stage flow diagrams, Starlark viewer, API curl examples,
+  and "Try It" buttons. Route: `/s/workflow-demo`.
+- **Engine context fix**: `started_by` added to automated stage Starlark context
+  dict, enabling hooks to reference the workflow initiator.
+- **SLA package installer**: `sla_seconds` field added to `workflowPkgStage`
+  struct and wired in both install and export paths.
+- **Snapshot format fix**: `parseSnapshotStages` helper handles both wrapped
+  (`{"stages":[...]}`) and legacy flat array snapshot formats in the engine,
+  fixing `corrupt version snapshot` errors when starting published workflows.
+- **Workflow adoption**: `POST /teams/:teamId/workflows/:id/adopt` claims a
+  global (team_id=NULL) workflow for a team. `GET /teams/:teamId/workflows/available`
+  lists adoptable workflows. `TeamID` added to `WorkflowPatch` model.
+- **Tests**: 3 new engine tests (automated context, SLA install, manifest
+  roundtrip). Total: 142 handler tests passing.
+- Per-package `README.md` files for all 5 new packages.
+
+### Fixed
+
+- **Demo surface**: Added `sw.userMenu` to topbar. Fixed workflow install
+  detection (was reading wrong response key). CSS uses theme variables for
+  dark mode support.
+- **Admin teams tab**: Extracted `.data` from paginated response — was stuck
+  at loading because `setTeams` received the envelope object, not the array.
+- **Team-admin workflows**: Added "Adopt Global" button to claim package-installed
+  workflows into a team scope. Workflow list now unwraps paginated responses.
+
 ## v0.3.5 — Settings Audit + ICD + Tests + Clone
 
 ### Added