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.

monitoring/loki/.pi-map.index.md

@@ -2,7 +2,7 @@
 dir: monitoring/loki
 
 ## role
-Provides configuration for deploying and managing the Grafana Loki log aggregation server.
+Provides configuration for Grafana Loki, the centralized log aggregation server in the project's monitoring stack.
 ## parent
 index: monitoring/.pi-map.index.md
 map: monitoring/.pi-map.md

monitoring/loki/.pi-map.md

@@ -4,11 +4,11 @@ dir: monitoring/loki
 index: monitoring/loki/.pi-map.index.md
 
 ## role
-Provides configuration for deploying and managing the Grafana Loki log aggregation server.
+Provides configuration for Grafana Loki, the centralized log aggregation server in the project's monitoring stack.
 ## files
 - loki.yml | Configures Grafana Loki log aggregation server with local filesystem storage and 30-day retention | dep: loki, tsdb, filesystem storage, inmemory ring kvstore
 ## arch
-Single-file declarative configuration defining Loki's storage backend (local filesystem) and data retention policy (30-day table).
+Uses a declarative YAML configuration pattern utilizing local filesystem storage with a 30-day log retention policy.
 ## tags
 loki, configures, grafana, log, aggregation, server, local, filesystem
 ## symbols