chore: regenerate stale .pi-map.md / .pi-map.index.md project maps

Project map had drifted: claimed recharts unused (was used), ObservabilityPage.tsx
exists (refactored to service-tabs/), missed JellyfinNowPlayingWidget +
authentik/backups service types. Regenerate to reflect post-change reality:
new Qbittorrent/LineSeriesChart/Prometheus{Gauge,Mean}Widget files,
service_data.py/qbittorrent_store.py, canonical prometheus-charting +
service-storage specs, archived changes.

backend/src/media_library_viewer_api/services/.pi-map.index.md

@@ -2,7 +2,7 @@
 dir: backend/src/media_library_viewer_api/services
 
 ## role
-Backend service layer providing business logic for media library management, backup monitoring, email notifications, SSH task execution, encryption, and persistent settings storage.
+Backend service layer providing business logic for media indexing, backup monitoring, email delivery, secrets management, task execution, and persistent storage operations.
 ## parent
 index: backend/src/media_library_viewer_api/.pi-map.index.md
 map: backend/src/media_library_viewer_api/.pi-map.md
@@ -19,7 +19,10 @@ map: backend/src/media_library_viewer_api/.pi-map.md
 - mailer_impl.py
 - media_index.py
 - media_index_impl.py
+- qbittorrent_store.py
 - secrets.py
+- service_data.py
+- service_resolution.py
 - settings_store.py
 - targets.py
 - task_runner.py