Use empty scp sync for TP2 fleet job

runs/frontier-tp2-prefill-serving-v0/experiment-card.md

@@ -68,6 +68,9 @@
   repository 从 `origin/feature/sim` commit 建立的相邻 detached worktree
   `/home/admin/cpfs/wjh/aituner/aituner-frontier-tp2-prefill-serving-v0`；
   不修改 canonical checkout。
+- **Fleet sync deviation：** dash1 未安装 `rsync`。fleet mandatory sync 使用
+  `scp` 一个已校验为空的 `/tmp/frontier-tp2-prefill-serving-v0-empty-sync`
+  目录；实验代码仍只来自上述 Git worktree。
 
 ## 结果
 

runs/frontier-tp2-prefill-serving-v0/fleet.toml

@@ -12,12 +12,11 @@ gpu_free_memory_mb = 1024
 gpu_free_utilization_pct = 10
 prefer_pack = true
 
-# Code is synchronized by Git. The fleet's mandatory rsync pass is intentionally
-# empty so it only schedules and harvests the committed remote checkout.
+# Code is synchronized by Git. The fleet's mandatory scp pass uses an empty local
+# directory so it only schedules and harvests the committed remote checkout.
 [sync]
-mode = "rsync"
-local_path = "runs/frontier-tp2-prefill-serving-v0"
-exclude = ["*"]
+mode = "scp"
+local_path = "/tmp/frontier-tp2-prefill-serving-v0-empty-sync"
 
 [[hosts]]
 name = "dash1"