delivery_driver_stock_picking_batch

Adds driver visibility to stock picking batches by aggregating drivers from their pickings.

Key Features

stock.picking.batch: Aggregates drivers from linked pickings into a stored many-to-many driver field for each batch.
inventory operations: Presents batch drivers as tags in batch transfer forms and lists for quick visibility.
stock.picking.batch search: Adds a driver filter that lets users group batch transfers by assigned drivers.