prod: compose TrueNAS Custom App (pattern Hooplab) + ajout aux assets de release

- docker-compose.truenas.yml : image registry + pull_policy always + volumes bindes
  sur /mnt/appdata/mkv2avi et /mnt/pool-r440/data/films, ports 8091/8090
- workflow : docker-compose.truenas.yml ajoute aux assets de la release

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitea/workflows/release.yml

@@ -49,7 +49,7 @@ jobs:
             -H "Authorization: token $TOKEN" -H "Content-Type: application/json" \
             -d "{\"tag_name\":\"$TAG\",\"name\":\"$TAG\",\"body\":\"$BODY\"}" | jq -r '.id')
           echo "Release créée (id=$REL_ID)"
-          for f in docker-compose.prod.yml .env.prod.example; do
+          for f in docker-compose.truenas.yml docker-compose.prod.yml .env.prod.example; do
             curl -sSf -X POST "$API/releases/$REL_ID/assets?name=$f" \
               -H "Authorization: token $TOKEN" \
               -F "attachment=@$f;type=text/plain" >/dev/null