Under the hood
Permission asks now record how long they were queued and asking, feeding new timing fields into tool-call telemetry.
A new PendingCall-tracking class records elapsedMs, queuedMs, and askingMs for each tool permission ask. This feeds new fields into the MCP tool-call outcome telemetry event: time_to_terminal_ms, asking_ms, queued_ms, checkin_misses, held, call_id, and host_epoch.