Inject meta tags in Tracing-without-Performance-mode

[AbhiPrasad]

Extracted from #8352 as standalone task. Make sure tracing without performance works for injecting meta tags.

We should gate this with a new boolean option.

Tasks

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1. feat(core): Add getTraceData function #13134
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2. feat(core): Add getTraceMetaTags function #13201
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3. [Sveltekit] Inject meta tags in Tracing-without-Performance-mode #13106
   Package: sveltekit +1
   
4. [Nextjs] Inject meta tags in Tracing-without-Performance-mode #13303
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5. [Nuxt] Inject meta tags in Tracing-without-Performance-mode
6. [SolidStart] Inject meta tags in Tracing-without-Perfomance-mode
7. [Remix] Inject meta tags in Tracing-without-Performance-mode

[lforst]

@AbhiPrasad What exactly needs to be done here? I would like to do this for Next.js but don't fully understand the task.

[AbhiPrasad]

Right now we only inject meta tags if there is a sampled transaction/span. It would be great if we can remove this condition and inject meta tags based on the propagation context.

Same conditional logic like we have for undici:

sentry-javascript/packages/node/src/integrations/undici/index.ts

Lines 175 to 185 in 530f786

	if (span) {
	const dynamicSamplingContext = span?.transaction?.getDynamicSamplingContext();
	const sentryBaggageHeader = dynamicSamplingContextToSentryBaggageHeader(dynamicSamplingContext);
	setHeadersOnRequest(request, span.toTraceparent(), sentryBaggageHeader);
	} else {
	const { traceId, sampled, dsc } = scope.getPropagationContext();
	const sentryTrace = generateSentryTraceHeader(traceId, undefined, sampled);
	const dynamicSamplingContext = dsc || getDynamicSamplingContextFromClient(traceId, client, scope);
	const sentryBaggageHeader = dynamicSamplingContextToSentryBaggageHeader(dynamicSamplingContext);
	setHeadersOnRequest(request, sentryTrace, sentryBaggageHeader);

[lforst]

Got it. Thanks!

[lforst]

@AbhiPrasad I wonder if this will screw with the trace view in replays a lot. This would essentially cause browser sessions of multiple different users to be grouped together under one server process 🤔 Maybe this is not what we want at all...