argo_archived_workflows table partitions

argo_archived_workflows can get quite large, to improve selects i suggest having a new default column at date level (dd-mm-yyyy) and partition on it

Locate the schema or migration that defines argo_archived_workflows and inspect the queries that read archived workflows. Determine how a date-level default column and partitioning should be represented there; done means the table is partitioned by that value and the relevant selects continue to work.

Written by the indexing model from the issue text.