fix query to get most recent actor catalog fetch event for some sources

[mfsiega-airbyte]

What

Fix the query to get the most recent actor catalog fetch event for some sources.

This query is both inefficient -- fails to apply the source id filter -- and possibly incorrect -- if two rows exist with the same actor_id, actor_catalog_id, created_at values, it will crash. This is unlikely since created_at is a timestamp, but the frontend actually ends up issuing two simultaneous discovery workflows, so it ends up happening more often than you'd expect. See #21208.

How

• Use row_number() instead of rank(), which handles duplicates.
• Applies sourceId filter.

[github-actions]

Airbyte Code Coverage

File	Coverage [81.63%]	🍏
ConfigRepository.java	81.63%	🍏

Total Project Coverage	26.69%	🍏

[mfsiega-airbyte]

@benmoriceau just FYI - I noticed that the query was choking on an empty list of source ids. Short-circuiting seemed simplest, do you mind taking another look?