frank-default-small: prefill-max ncmoe 35 / ubatch 3072

Prefill is the priority for this workload. Switch from decode-max
(ncmoe 32 / ubatch 1024) to prefill-max:
- n-cpu-moe 35, ubatch 3072: prefill ~1458 t/s (top tier), gen ~45.4 t/s,
  ~1.2 GiB headroom at the 800k pool.
- Gen is independent of ubatch; ub 3072 reaches best prefill with no
  decode cost. Docs synced (benchmark Chosen State, deployment, specs).

scripts/serve-llama-frank-small.sh

@@ -32,10 +32,10 @@ fi
 : "${NGRAM_MOD_N_MATCH:=24}"
 : "${CACHE_TYPE_K:=q8_0}"
 : "${CACHE_TYPE_V:=f16}"
-: "${N_CPU_MOE:=32}"     # 32 of 40 layers: MoE expert weights stay on CPU; 8 on GPU
+: "${N_CPU_MOE:=35}"     # 35 of 40 layers: MoE expert weights stay on CPU; 5 on GPU
 : "${N_GPU_LAYERS:=all}" # every non-expert tensor goes to GPU
 : "${BATCH_SIZE:=2048}"
-: "${UBATCH_SIZE:=1024}"
+: "${UBATCH_SIZE:=3072}"
 : "${CTX_CHECKPOINTS:=0}"
 : "${NO_MMAP:=0}"
 : "${TEMPERATURE:=1.0}"