Groundwork for Jellyseerr request stats in the Jellyfin service, behind a
small reusable abstraction so future stats services (Sonarr/Radarr) reuse it.
Backend:
- JellyseerrClient.request_count() -> /api/v1/request/count (normalized
total/pending/approved/declined/processing/available) and recent_requests()
-> /api/v1/request mapped to {name,type,status,media_status,created_at}
with numeric status enums labelled.
- widgets/stats_provider.py: StatsProvider protocol + registry keyed by
service_type (StatValue/StatsResult). A thin generic interface.
- widgets/jellyseerr_stats.py: JellyseerrStatsProvider registered for the
Jellyfin service; reuses one authenticated client per service (lru_cache) and
caches the StatsResult for ~10s under a lock, so multiple widgets + the tab
collapse onto one Jellyseerr fetch (same lesson as the qBittorrent client).
Accepts jellyseerr_api_key from secrets OR config during the upcoming
config->secret migration.
- Jellyfin service gains two widget kinds: `stat` (a Literal selector over the
six stats — the "extract one value into a widget" affordance) and
`stats_overview` (all stats + recent list).
- widgets router routes widget_kind in {stat, stats_overview} to a generic
StatsWidgetSource (dispatches to the service type's provider), independent of
service type.
- new /api/jellyseerr/stats router endpoint for the Requests tab (resolves the
Jellyfin service by id or first-enabled; shares the provider cache).
Tests: provider normalization, not-configured, TTL caching; stat selector +
overview + unknown-stat widget dispatch; 7 new tests. 400/400 backend pass;
ruff clean.
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