feat: canonical citation count harmonization across APIs #47
Description
Description
Different APIs (CrossRef, Semantic Scholar, OpenAlex) report different citation counts for the same DOI. Add a canonical_citation_count field resolved via a fixed priority: Semantic Scholar > OpenAlex > CrossRef > raw collected value. Log discrepancies above a configurable threshold.
Justification
The current 4-tier citation resolution is non-deterministic — the same paper may pass or fail the citation filter depending on which API responded first, making results non-reproducible across re-runs. A deterministic, auditable citation count is a prerequisite for systematic review reproducibility.
Affected files
scilex/citations/citations_tools.pyscilex/config_defaults.py