Run go mod tidy

Isolate local dyanmodb instance in tests

Remove commented out flushing code

Print local filename on cli pull success

cli: flush on file push

Propagate error on missing metadata

Fix schemav2 write holding onto buf reference

Add LsFiles

Aggressively cache write sectors until sync

Detect non-filled sectors on read.

Update gh actions

Update ci go-versions

Add sectorcache for schemav2 files

Add schemav2 storage

Add option for default schema version