Account Create Cash Basis Entry Hook

This is a technical module for developers and accountants using cash basis taxes. It does not add any new screens, menus or buttons. Instead, it modifies how Odoo creates the accounting entries for cash basis taxes when an invoice is reconciled with a payment.

• It replaces the standard method that creates cash basis entries with a version that calls a new hook, _set_additional_context, before each journal item is processed. Other modules can override this hook to supply extra information (for example, an analytic account or a custom field) that will be used when the cash basis entry is built.
• The rest of the cash basis logic is kept unchanged: it still calculates the percentage of the invoice that has been paid, creates the tax basis move, posts it, and reconciles the lines when needed.
• The module touches the account.partial.reconcile model and the cash basis entry creation flow in account.move. It does not create new models or data.

Because the hook returns an empty context by default, installing this module alone does not change any visible behaviour in Odoo. Its purpose is to make it possible for other modules to customise cash basis entries without copying the whole standard method.