[record-hook] plugin fails silently when sheet slug is incorrect

[alexhollenbeck]

When using plugin-record-hook, you have to pass a sheet slug specifying which sheet you are attaching the record hook to:

listener.use(
    recordHook('mySheetSlug', (record: FlatfileRecord) => {
        ...

If mySheetSlug does not exist in whatever configuration I am deploying to / developing with, the record hook will silently fail (do nothing). This make its usage somewhat brittle, since sheet slugs have to be stored in multiple places and have to be kept manually up to date.

It would be nice if, at the very least, I got a warning somewhere that I had a record hook attached to a non-existent sheet.