chore(bench): 补 .dockerignore 忽略项，bench 容器不再挂持久化卷

.dockerignore

@@ -7,3 +7,10 @@ server/webui/dist
 data
 *.db
 transcripts
+bench/kv
+bench/debug
+bench/__pycache__
+bench/.env
+bench/scheduler.py
+bench/entrypoint_v2.sh
+bench/seed_v2.sh