Add a command-line interface for Registry.queryDataIds. Like queryDatasets (
DM-26685), this one has a lot of optional keyword arguments that may make it more difficult to wrap well, and just like there, I think the dataId argument is at least one that can be ignored. It doesn't have as many "downstream" methods whose scripts will need to call it as well, but I think it will eventually have a few.
I'm calling this a deprecation blocker because it's probably the most important tool for debugging problems in QG generation without resorting to direct SQL.