Schema:Search stopped working due to a change in how resourceloader modules are defined. This module was included explicitly in pages, rather than via a startup module, which means even if we fix it in its current location we would need to wait 30 days for the varnish caches to clear to be collecting the full set of data.
Rather than wait, move this code to the WikimediaEvents repository where it should have been in the first place, and where there is support to get javascript included in all pages, cached or otherwise, within 5 minutes of deploying to the cluster.
https://meta.wikimedia.org/wiki/Schema:Search is not generating any data; the data it is missing cannot possibly be backfilled. This needs fixing at the earliest opportunity - it would also be good to find out what happened, overall, so we know if this was somebody introducing a bug or some issue with the schema that led to it being disabled without telling us, or...?