feat: add dashboards — tables, CRUD API, widget data endpoint
- New dashboards table (name, description, layout, is_default)
- New dashboard_widgets table (view_id, title, widget_type, position, config)
- GET/POST/PATCH/DELETE /dashboards
- GET/POST/PATCH/DELETE /dashboards/:id/widgets
- GET /dashboards/:id/widgets/:id/data — runs saved view filters,
returns pre-aggregated data for count/ticket_list/status_chart/grouped_counts
- is_default uniqueness enforced on PATCH
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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