Spine drop batches once logical and physical compaction frontiers are empty#399

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antiguru wants to merge 3 commits intoTimelyDataflow:masterfrom antiguru:fix_398

+133-5

Commits on Jul 19, 2023

Spine drop batches once logical compaction frontier is empty
antiguru
committed
Introduce an empty batch on advancing logical compaction to []
antiguru
committed
Consider both logical and physical compaction when closing trace
antiguru
committed