Account Analytic Parent Plan Restrict

This module adds a consistency rule to analytic accounts. When a user saves an analytic account, Odoo checks the account's analytic plan against the plan of its parent and against the plans of its children.

• If the account has a parent whose analytic plan is different, saving is blocked with a message naming both the account and its parent.
• If any child account belongs to a different analytic plan than the account being saved, saving is also blocked, and the message lists the offending children.

The rule is enforced automatically whenever the plan or the parent is set or changed, so users cannot build a hierarchy that spans more than one analytic plan. It applies to the account.analytic.account model, which is the same model used for analytic accounts throughout Accounting. No new menus, screens, buttons, reports or scheduled jobs are added; the only visible change is the validation error shown when an inconsistent hierarchy is saved.