Feat: Adapt scheduled tasks for the new conversation page (#3584) * feat: implement scheduled-task proposal tool and enhance automation context handling * refactor: streamline scheduled task proposal handling and remove idempotency key * feat: enhance message indexing and history handling for user messages * test: stub conversation unit updater in automation runner tests * feat: enhance message indexing and history handling for user messages * feat: enhance message indexing and history handling for user messages |