What this PR does / why we need it? 1.Record expert map without dynamic eplb. 2.Add export PYTHONOPTIMIZE=1 when using dynamic eplb. 3.change eplb doc Does this PR introduce any user-facing change? How was this patch tested? Qwen3_moe in A3. - vLLM version: v0.11.0 --------- Signed-off-by: offline0806 <3337230449@qq.com> Co-authored-by: offline0806 <3337230449@qq.com>