A Ticket object snapshots an operation's priority upon entering the storage engine, and this snapshot is correctly used for metrics when the ticket is released.

However, the Ticket class currently holds a reference to the entire AdmissionContext, creating a risk that future code changes might incorrectly use the live priority from the context instead of the snapshotted value, leading to inaccurate metrics.

To harden the code and prevent any potential bug, the pointer to AdmissionContext should be removed from the Ticket class, ensuring it only stores the specific values it needs directly.