universe: universe stats DB issues during universe sync

[jharveyb]

Similar issue to what is fixed with #348.

Can reproduce with make itest icase=universe_sync, source:

taproot-assets/universe/syncer.go

Line 189 in c037025

_, err = s.cfg.LocalRegistrar.RegisterIssuance(

[jharveyb]

New DB errors seen when running a test from #325:

2023-06-12 13:45:27.369 [ERR] RPCS: [/universerpc.Universe/QueryProof]: unknown sqlite error: interrupted (9)
2023-06-12 13:45:27.369 [WRN] UNIV: unable to sync universe state: unable to register issuance proof: unable to register new issuance: disk I/O error (1802)

Maybe we need a change similar to #334 for the SQLite backend?

[dstadulis]

Might be some other batching changes we'd want but will prio that for v0.3