Show CODECHECKs in Scholia profiles, and cover other reproducibility reports

Follow-up to #50, which is done: the register is on Wikidata and the certificates carry `review of` ([P6977](https://www.wikidata.org/wiki/Property:P6977)) links to the works they check. Two threads parked in that issue are their own work and continue here.

**1. Scholia.** Now that the data is there, the certificates should show up where people look at a work or an author: [Scholia](https://scholia.toolforge.org/) profiles. This means talking to the Scholia team about rendering `review of` on a work profile, and it is more likely to succeed if reproducibility reports in general are covered rather than CODECHECK alone - ReScience C ([Q113301915](https://www.wikidata.org/wiki/Q113301915), [Q98786106](https://www.wikidata.org/wiki/Q98786106)) is the obvious partner.

**2. Other reproducibility reports.** Reports from other venues could be modelled the same way, e.g. the ACM REP artifact reports:

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The model in `R/wikidata.R` is not CODECHECK-specific in its shape - a report that reviews a work, typed [Reproducibility Report](https://www.wikidata.org/wiki/Q116740071) - so the question is whether we describe those reports ourselves or agree a shared pattern with their publishers first.

Start by reading R/wikidata.R and the completed #50 context, then compare the linked ACM reports with the existing Reproducibility Report model. Confirm with Scholia and publishers whether a shared pattern is accepted; done means reports are represented consistently and `review of` appears on relevant Scholia work and author profiles.

Written by the indexing model from the issue text.