Record OTEL status value on spans

[jsumners-nr]

Spec PR 766 clarifies that agents must record Open Telemetry's "status" value as agent attributes on recorded spans.

• https://open-telemetry.github.io/opentelemetry-js/interfaces/_opentelemetry_sdk-node.node.ReadableSpan.html#status
• https://open-telemetry.github.io/opentelemetry-js/interfaces/_opentelemetry_sdk-node._opentelemetry_api.SpanStatus.html
• https://open-telemetry.github.io/opentelemetry-js/enums/_opentelemetry_sdk-node._opentelemetry_api.SpanStatusCode.html

When the span ends, we must update the agent attributes:

let code
switch (span.status.code) {
  case 0: { code = 'unset'; break; }
  case 1: { code = 'ok'; break; }
  case 2: { code = 'error'; break; }
}
segment.addAttribute('status.code', code)
if (code === 'error') {
  segment.addAttribute('status.description', span.status.message)
}

node-newrelic/lib/otel/traces/span-processor.js

Lines 51 to 72 in ae0074b

	onEnd(span) {
	if (span[otelSynthesis] && span[otelSynthesis].segment) {
	const { segment, transaction, rule } = span[otelSynthesis]
	const { instrumentationScope } = span
	// We always attach the instrumentation scope data as agent attributes
	// if the OTEL span has them set.
	// See https://opentelemetry.io/docs/specs/otel/common/mapping-to-non-otlp/#instrumentationscope
	if (typeof instrumentationScope.name === 'string') {
	segment.addAttribute('otel.scope.name', instrumentationScope.name)
	segment.addAttribute('otel.library.name', instrumentationScope.name)
	}
	if (typeof instrumentationScope.version === 'string') {
	segment.addAttribute('otel.scope.version', instrumentationScope.version)
	segment.addAttribute('otel.library.version', instrumentationScope.version)
	}
	this.updateDuration(segment, span)
	this.handleError({ segment, transaction, span })
	this.reconcileAttributes({ segment, span, transaction, rule })
	delete span[otelSynthesis]
	}

[Newrelic-Boomi]

https://new-relic.atlassian.net/browse/NR-500595