New endpoint manually triggers a consolidation pass for a single task.
Bypasses the auto_consolidate_tasks setting since the user is asking
explicitly. Returns the task with the freshly-written body and
consolidated_at timestamp.
Also un-aliases description and body in the create/update task routes
(was: description folded into body as legacy fallback). With separate
fields under the task-as-durable-record design, both flow through as
distinct kwargs to create_note / update_note.