Merge pull request #298 from cardano-foundation/perf/caribic-start-parallel
perf: caribic start parallelism
perf: caribic start parallelism
test: add ICS-20 cardano to sidechain voucher return test
test: add ICS-20 sidechain-to-cardano transfer test
fix: ICS-20 transfer prereqs
docs: update KNOWN_ISSUES.md
feat: update gateway proof contract