Description: |
  Add unique index to hopefully avoid some duplication. We only ever
  need equality, so default btree indexes should be fine, even on jsonb
Created: 2021-10-21 15:13:41.083509 UTC
Depends: 2021-10-18_07-40-31_add-snapshots-table
Apply: |
  CREATE UNIQUE INDEX ON snapshots (signature, names, state);

Add unique index to snapshots
Add unique index to snapshots

Should avoid some duplication, especially on the default snapshot. We
only ever need strict equality, so default btree indexes are fine,
even on jsonb.
