Stats dashboard

It would be nice to have something along the lines of https://stats.aclrollingreview.org/

For example:

- Total number of papers, volumes, events, unique authors by year
- Distribution of number of authors per paper per year
- Pie chart of venues (by number of papers) per year
- Number, percentage of authorships with ORCIDs over time
- Number, percentage of person IDs with an ORCID over time
- Number, percentage of extended-slug person IDs that are semantic (degree institution) vs. automatic (ORCID suffix). If manual verification always introduces a semantic suffix, that reveals how many person entries are automatic.
- Number, percentage of (papers, volumes) with DOIs by year
- Number of unverified author pages
- Paper appearances on verified vs. unverified author pages