Start cutover to new datastores structure

CHANGELOG.md

cmd/media_repo/reloads.go

common/assets/process.go

common/config/access.go

common/config/models_domain.go

common/logging/logger.go

common/runtime/init.go

config.sample.yaml

database/db.go

database/table_datastores.go

database/table_media.go

storage/datastore/datastore.go