cis-sage clustering with blocklist fusions

We noticed that in the main metafusion script, that blocklist fusions are not filtered prior to cis-sage clustering. i'm wondering if this is possibly a bug.

Start by locating the main MetaFusion metafusion script and trace how blocklist fusions are handled relative to cis-sage clustering. Determine whether blocklist fusions reach clustering before filtering and identify the expected behavior from the surrounding workflow. Done means the filtering order is verified and the bug report is either confirmed with a reproducible case or shown not to apply.

Written by the indexing model from the issue text.