fix(auth): address Task 13 deployment review findings

docker/core-entrypoint.sh

@@ -13,6 +13,10 @@ node /app/docker/ensure-pi-trust.mjs "${THT_HARNESS_DIR:-/app/harness}"
 cmd="${1:-server}"
 case "$cmd" in
   server)
+    [[ "${THT_AUTH_STATE_ROOT:-/data/auth}" == /data/auth ]] \
+      || { printf '%s\n' 'authentication state root is invalid' >&2; exit 1; }
+    printf '%s\n' '{"version":1,"operation":"ensure-layout","root":"/data/auth"}' \
+      | "${THT_AUTH_STORAGE_BIN:-/usr/local/bin/tht-auth-storage}" _auth-storage >/dev/null
     exec node /app/backend/dist/server.js
     ;;
   check)