dillard
93fec0e8f3
BackupRun is a resumable state machine: each step works until a deadline, uploads its pack and tree segment, and returns the state; large files are resumed at the next blob. Snapshot is written last. Spike F: 200 MiB file resumed across steps in separate processes; with 6 random kill -9 the run completes and restores bit-identically. spikes/RESULTS.md summarises phase 0 and the findings for the plan.