[WIP] WIP address feedback on graph nodes fetching script test

[Copilot]

Thanks for the feedback on #3. I've created this new PR, which merges into #3, to address your comment. I will work on the changes and keep this PR's description up to date as I make progress.

Original PR: #3
Triggering review: #3 (comment)

@copilot it was a mistake. I changed it to the actual test I wanted (that is, in_decade_references contains all the referenced works that are in oa_ids).

assert (
                set(referenced_works)
                .intersection(oa_ids)
                .issubset(set(in_decade_references))
            )

What do you think?

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