[x] Ensure that the read timestamp for a query is the latest commit ts + 1. This is because rollups set the value to the latest write ts + 1.
[ ] Ensure that Zero snapshots and Alpha snapshots work.
[ ] Rewrite type system. Perhaps using type level UIDs.
[x] Check that an update mutation won't cause duplicate XIDs. [x] Deal with nested objects and their upserts. [x] NumUids in deletion operation doesn't return any value. [ ] Without upsert, we seem to be adding duplicate records.
[x] Addition works with inverse. [x] Deletion works with inverse. [x] Update works with inverse. [x] A new user, assigned to an existing task doesn't correctly remove the task from the older user.
[ ] Build a cache system, which can retrieve objects concurrently to aid with mutations.
[ ] Separate out values from UIDs. Posting shouldn't be storing both. [ ] Don't use value hashes as UIDs for postings.
[ ] This doesn't work right now. Fix it: <subject:"0x2466c53" predicate:"Account.Outgoing" object_value:"\t_STAR_ALL" op:DEL >
[ ] Have a debug endpoint to inspect Badger table overlaps.