Variable Telemetry`Const`

Telemetry: Readonly<
    {
        attach: (input: unknown) => Result<Readonly<{ detach(): void }>>;
        events(): readonly TelemetryEventName[];
        isHandle(value: unknown): value is Readonly<{ detach(): void }>;
    },
> = ...

The v1 event names, as documented in the observability reference.