feat: add GPU status logging with state tracking to prevent duplicate log messages and configure NVIDIA runtime in docker-compose

Add graphics_log_state global to track GPU query status and prevent duplicate log messages. Log warning with error_summary() when nvidia-smi is unavailable or returns non-zero exit code. Log info message when GPU status becomes available with GPU count and binary path. Track signature tuples for unavailable/failed/ok states including GPU index/name/temperature/utilization.

docker-compose.yml

@@ -3,6 +3,7 @@ services:
     build: .
     container_name: media-max
     restart: unless-stopped
+    gpus: all
     ports:
       - "8099:8099"
     devices:
@@ -16,6 +17,9 @@ services:
       - "host.docker.internal:host-gateway"
     env_file:
       - .env
+    environment:
+      NVIDIA_VISIBLE_DEVICES: ${NVIDIA_VISIBLE_DEVICES:-all}
+      NVIDIA_DRIVER_CAPABILITIES: ${NVIDIA_DRIVER_CAPABILITIES:-compute,utility}
     volumes:
       # Host-Pfad deiner Film-Library -> interner Dashboard-Pfad
       - ${FILM_MEDIA_VOLUME}:/media/filme:ro