When viewing a compound annotation with volume layers, the merged volume buckts and tracing layers are stored in memory in a TemporaryStore. However, the segment index is still stored in fossildb. This is inconsistent and is a waste of storage. It should also be stored in a TemporaryStore.
Note that this should be tackled after #7839 to avoid merge conflicts.
When viewing a compound annotation with volume layers, the merged volume buckts and tracing layers are stored in memory in a TemporaryStore. However, the segment index is still stored in fossildb. This is inconsistent and is a waste of storage. It should also be stored in a TemporaryStore.
Note that this should be tackled after #7839 to avoid merge conflicts.