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.

.pi-tmp/.pi-map.index.md

@@ -0,0 +1,25 @@
+# .pi-tmp (index)
+dir: .pi-tmp
+
+## role
+Documentation and reporting workspace containing acceptance reports and change documentation for iterative feature development and refactoring efforts.
+## parent
+index: ./.pi-map.index.md
+map: ./.pi-map.md
+## children
+-
+## files
+- followups-batch1-out.md
+- four-fixes-out.md
+- grafana-chart-out.md
+- refine-23-out.md
+- refine-4-out.md
+- reusable-widgets-out.md
+- widgets-out.md
+## links
+index: .pi-tmp/.pi-map.index.md
+map: .pi-tmp/.pi-map.md
+## workflows
+-
+## dirty
+-