Returns the project's timing milestones on a single server clock, so a consumer can measure how long QA took to start producing activity and to finish without draining event streams.

Fields:

• created_at — when the project was created (ISO 8601 UTC).
• started_at — when work actually began (earliest task start), or null if none has started yet.
• first_event_at — server-side arrival time of the earliest rrweb event across ALL of the project's recordings (explorations + test runs); null if no events yet.
• finished_at — when the project last went idle; null while QA is still running.
• time_to_first_event_ms / time_to_complete_ms — deltas measured from created_at (null when the corresponding timestamp is null).