Attach emails and meetings to tasks / custom objects (1-to-N exchanges)

Context We run a self-hosted Twenty (v2.43) to manage our activities: events, a SaaS product, freelance missions. Our contacts, companies, projects and tasks live there, and our emails are synced from Gmail. What we need We track our exchanges one by one. An "exchange" is a 1-to-N follow-up with a person or a company — a native task or a custom object — that contains several emails over time: first contact, follow-ups, replies… with a state (*to contact / waiting reply / to answer / to follow up*) and a deadline. The problem, concretely Take "getting ACME to sponsor the 2027 edition": • over six months, this exchange contains around fifteen emails; • exchanged with three different people. Six months later, to pick the file back up, we need to open the task and immediately find the related emails. Today, that's impossible. What exists today Email threads only link to People / Companies / Opportunities. So we can *access* the emails from th…