feat: add datastore view with storage categories, RAID status monitoring, and live recovery tracking

Add scan_datastore_storage() to walk DATASTORE_PATH and categorize media by directory structure (movies/series/anime/kdrama/downloads/other) with size/file counts. Add raid_status() to parse /proc/mdstat and mdadm --detail for RAID level, active/failed devices, and recovery progress. Add /api/datastore endpoint with 15-minute cache for storage scans and live RAID updates. Install mdadm/util-linux/

docker-compose.yml

@@ -5,6 +5,8 @@ services:
     restart: unless-stopped
     ports:
       - "8099:8099"
+    devices:
+      - "${RAID_DEVICE:-/dev/md127}:${RAID_DEVICE:-/dev/md127}"
     extra_hosts:
       - "host.docker.internal:host-gateway"
     env_file:
@@ -14,6 +16,10 @@ services:
       - ${FILM_MEDIA_VOLUME}:/media/filme:ro
       # Falls Sonarr verwendet wird, muss SERIES_MEDIA_VOLUME auf die Serien-Library zeigen.
       - ${SERIES_MEDIA_VOLUME:-/nesflix/serien}:/media/serien:ro
+      # Read-only Datastore für Größen-/Kategorie-Scans.
+      - ${DATASTORE_HOST_PATH:-/nesflix}:/nesflix:ro
+      # Read-only Host-Devices für lsblk/smartctl; Media Max führt keine RAID-Schreiboperationen aus.
+      - /dev:/host-dev:ro
       - ./data:/data
     networks:
       - media