dev.knotless.getAccountData

Counts the records the asking account holds in each dev.knotless.* collection, read from its PDS rather than the index, and names its repositories, public and private, with how many other accounts push to or read each: what dev.knotless.deleteAccountData would delete, as `knotless account delete-data` lists it. A private repository's records are in its space, counted as one space. Only the account itself, logged in to this appview's web pages, can ask: the appview reads its spaces with the session it keeps for it, which the pages' session cookie names.