perf: frank-default-large batch capped at 2048/2048 — 3x200700 ctx KV ~50GB leaves no room for batch 12288 (OOM)

scripts/serve-llama-frank-large.sh

@@ -35,8 +35,8 @@ fi
 : "${N_GPU_LAYERS:=all}"
 : "${CACHE_TYPE_K:=q8_0}"
 : "${CACHE_TYPE_V:=f16}"
-: "${BATCH_SIZE:=12288}"
-: "${UBATCH_SIZE:=4096}"
+: "${BATCH_SIZE:=2048}"
+: "${UBATCH_SIZE:=2048}"
 : "${THREADS:=8}"
 : "${THREADS_HTTP:=8}"