Backfill catalog source_url for 9,551 Fish UUIDs

The 9,551 recovered fish images had NULL source_url in the catalog. The
URLs are now copied verbatim from the metadata parquets.

After the update, the only source with source_url as NULL is the
5,150,850 bioscan images.

dataset/catalog.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:b7cfa8769a6b55a20abfde89a7fa48beca8585c882ec7ea2fbac446841d91da4
-size 19970564575
+oid sha256:581701bad8d41b563ed79d402092aa25a13be051c8698b9948a536b2e880abd5
+size 17112752637