[#75705] Bulk price policy assignment for problem orders

The commit history includes a detour with a UI similar to send notifications with checkbox selection, so we might want to do some commit squashing. This version provides a single button that attempts to assign price policies to all those missing them for the current facility, whether they're displayed on the current page or not. The one-by-one "Assign" links remain.

In the problem orders partial, two table headers changed when humanizing: The "Accounts" column now reads "Payment Source" and "Date" became "Ordered Date". They should be more consistent than before.
I based this on how we're getting the list of problem orders for display, in `FacilityOrderStatusHelper#problem_orders`, which uses the same scopes. I considered consolidating the helper with this method, but it's a larger refactor than I expected.

Are there any odd implications of assigning price policies to orders that don't necessarily appear in the view?