Scopus API SearchSource

[Lea-Chaoui]

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Currently, colrev scopus only supports manual imports or file-based ingestion.
There is no way to search the Scopus database directly from CoLRev using the Scopus Search API
Issue Number: 554

What is the new behavior?

• Added unit tests using mocked API responses (similar to colrev.crossref).
• Implemented Scopus SearchSource with API key authentication (Elsevier API).
• Added ability to run colrev search -a colrev.scopus "" to query Scopus directly.
• Results are stored in data/search/ and integrated into the main bibliography via colrev load.
• Search updates only fetch new/modified records.

Does this introduce a breaking change?

• Yes
• No

Other information

• API key handling follows the pattern from colrev.ieee.
• Test units were no longer required for the project

[geritwagner]

Thank you for opening the pull request. If you have any questions with the implementation, I am happy to help.