Every pledge live at the close of a business date that has ended (as_of), replayed from the retained pledge events, with pledges whose undated history cannot be placed

Replays every retained pledge event to the close of as_of, a business date that has ended (409 conflict otherwise): each pledge reserved, pledged or releasing at that close, with the business date its state began. A pledge released on or before the date is absent. Events retained before ledger migration 0059 carry no business date; a pledge whose undated events could fall on either side of the date is listed in undated_pledges instead of placed. A read needs ledger:read or ledger:post.