TracingSink.recordSpan

void recordSpan(ulong  traceId,  ulong  spanId,  ulong  parentSpanId,
          scope  const(char)[]  name,  long  startUs,
          long  durationUs)

@safe nothrow;

Record a completed span.

Parameters

`traceId`	Unique trace identifier.
`spanId`	Unique span identifier within the trace.
`parentSpanId`	Parent span identifier (0 for root spans).
`name`	Operation name (e.g., `"handleRequest"`).
`startUs`	Span start time in microseconds since epoch.
`durationUs`	Span duration in microseconds.