Refactor code for calculating citation impact to improve efficiency

[paulalbert1]

Current state

The script checks for updates only be checking to see if citations are new or citation count is updated. Then it calculates the percentile rank and indexes entity IDs. This does not account for cases where external authors become internal authors.

Proposed solution

In update query, get all entity IDs from violin_wcmc_article, check authorships in field_data_endpoints table, and get the entity ID from node table from authorships and compare it against violin_wcmc_author table for those entity IDs. Additionally, also check for changes to citation count as well, and mark those entity IDs for indexing. Also, check the entity IDs where authorship entity IDs has changed in violin_wcmc_author table.