fix fetch efficiency in insert_curation

[samuelbray32]

Description

Quickfix for 1070. Not a breaking bug but made unnecessary fetch of full v0.Curation tables (currently has ~10^5 entries). instead only fetch and return key of interest.

Checklist:

• NO This PR should be accompanied by a release: (yes/no/unsure)
• NA If release, I have updated the CITATION.cff
• NO This PR makes edits to table definitions: (yes/no)
• NA If table edits, I have included an alter snippet for release notes.
• NA If this PR makes changes to position, I ran the relevant tests locally.
• I have updated the CHANGELOG.md with PR number and description.
• NA I have added/edited docs/notebooks to reflect the changes