List the activity timeline for a task.
Combines status transitions, assignments, comments, agent start
events, and resource mutations into a single stream ordered newest
first. Mutation entries surface the operation and changed field
names; full before/after snapshots live on the /mutations
endpoint.
Returns: Activity entries ordered newest first.
Raises: NotFoundError: If task not found or belongs to another organization.
Maximum entries to return
1 <= x <= 200Composite cursor '
Successful Response
Discriminator for entries in the activity timeline.
transition, assignment, mutation, comment, agent_started