The print scheduler had two code paths for queue items: model-based
(target_model set) and printer-specific (printer_id set). Only the
model-based path computed ams_mapping before starting the print. VP
queue items assigned to a specific printer went through the
printer-specific path with null ams_mapping, causing the printer to
default to the first AMS slot regardless of what the 3MF required.
Add _compute_ams_mapping_for_printer() call to the printer-specific
path, matching the existing model-based behavior.
maziggy
2284a76381