This fix adds a maximum limit to the number of chatter messages loaded at once. It helps keep records with long conversation histories responsive and prevents slowdowns when opening or using chatter.

- Task: https://www.odoo.com/web#id=6729&view_type=form&model=project.task&action=333&active_id=131
- Pad: https://pad.odoo.com/p/r.q6QePBp6BFlNfBEg