Analytic Tag Dimension Purchase Warning

This module connects the analytic tag dimension rules to purchase orders. It makes purchase order lines follow the same analytic dimension logic already used elsewhere in accounting.

When a user saves a purchase order line, the system checks the analytic tags selected on that line. If two tags belonging to the same dimension are used together, a warning is raised so the user can correct the entry before it is saved.

The module works on the purchase.order.line model and links it to the analytic dimension line behaviour. The analytic tags are read from the analytic_tag_ids field on the purchase order line.

It installs automatically when both the analytic tag dimension module and the purchase module are present, so no manual setup is needed. There are no new menus or screens; the change appears directly in the purchase order line form when tags are selected and the record is saved.