Account Due List Aging Comment

This module extends the Payments and Due List screen that comes from the Account Due List module. It does not create any new menu or screen of its own; it modifies the existing list view of journal items (account.move.line).

What changes for the user:

• A new free-text column called "Aging Comments" appears in the Payments list, placed right after the "Reconciled" column.
• The list becomes editable directly on the screen (editable at the top), so users can click into a line and type or change the comment without opening a separate form.
• The comment is stored on the journal item itself, so it stays with that line and can be used to explain why an amount is still open or how old it is.

No automatic rules are added: there are no checks, no computed values, no default values, no emails and no scheduled actions in the code. The module only adds the field and shows it in the list.

The only model touched is account.move.line, which is the model behind invoices, bills and payment entries. The only view changed is the Payments tree view inherited from account_due_list.view_payments_tree.