b3b167c075
New service types: - backups: BackupsConfig(ingestion_label), no secrets, summary widget kind. Modeled as a service so it can be named/multi-instanced like others. - authentik: AuthentikConfig(base_url, timeout_seconds), api_token secret (required). Directory source for the upcoming Users tab. Jellyseerr absorption: - JellyfinConfig gains optional jellyseerr_url + jellyseerr_api_key fields. - integrations/jellyseerr.py deleted; registry entry removed. - clients/jellyseerr.py stays (JellyseerrClient still used by enrichment). - One-time idempotent migration in settings_store.ensure_defaults(): jellyseerr service rows merge into a paired Jellyfin (exactly-one merges; multiple picks first unpaired; none/all-paired drops with a logged warning). The api_key is decrypted from secrets before moving to config. Registry is now 8 types: alertmanager, authentik, backups, grafana, jellyfin, nextcloud, prometheus, ssh_tasks. Tests: registry count updated to 8, jellyseerr-absent assertion, new-type definition assertions, and migration tests (single-jellyfin merge, no- jellyfin drop, idempotency). 256 backend tests pass; ruff clean. Refs openspec/changes/services-as-hub-ia/ (spec R6, tasks slice 1).