frank-medium: default RADIANCE_NORMQUANT_FUSION under set -u

dankserver/frank-medium/radiance-entrypoint.sh

@@ -159,7 +159,7 @@ R4D_SO=${R4D_SO:-/r4d}
 # The norm+quant fusion turns on vLLM's passes (one --compilation-config
 # instance; argparse keeps the last, so entries accumulate into one flag).
 CC_ITEMS=""
-if [ "$RADIANCE_NORMQUANT_FUSION" != "0" ]; then
+if [ "${RADIANCE_NORMQUANT_FUSION:-1}" != "0" ]; then
   CC_ITEMS="\"pass_config\":{\"fuse_norm_quant\":true,\"fuse_act_quant\":true}"
 fi
 EXTRA=${EXTRA:-}