10fd4ead4a
PR 2 of 4 for the runtime service registry change. - dashboard_widgets gains service_id + widget_kind columns (legacy addon_id/widget_type kept but unused). - Source adapters take (service: ServiceRecord | None, widget_kind, config). SERVICE_ADAPTERS keyed by service_type; BUILTIN_ADAPTERS for backups/static. - Backups and static stay as service-less built-ins (service_id nullable), exposed via GET /api/widgets/builtin. - SSH task adapter resolves the task + instance, runs over SSH, and appends a service_task_runs history row on success/failure/timeout/error. - Retire widgets/registry.py; widget metadata now comes from the integrations registry + widgets/builtin. Remove /api/widgets/types and /api/widgets/sources. - Stop default widget seeding (fresh install = empty dashboard). - Rewrite widget tests around the service-bound + built-in model (26 tests). Backend-only breaking change; frontend is reconciled in Slice 3. Build/lint stay green; pytest 222 passed.