feat(core): Apply request data to segment spans in span streaming

[chargome]

Implements the span-streaming counterpart of the requestDataIntegration.processEvent hook.

Request data from the scope's sdkProcessingMetadata is mapped to span attributes following sentry-conventions, reusing httpHeadersToSpanAttributes for sensitivity filtering and gating IP extraction behind sendDefaultPii.

Note: The logic is also guarded by client.getIntegrationByName('RequestData') so users who opt out of the integration don't get request data on streamed spans either.

This approach was chosen over adding a processSegmentSpan hook to the integration because captureSpan is tree-shakeable for non-streaming users, keeping the request data code out of bundles that don't need it (see linked ticket).

Closes #20380

[github-actions]

size-limit report 📦

Path	Size	% Change	Change
@sentry/browser	26.31 kB	-	-
@sentry/browser - with treeshaking flags	24.8 kB	-	-
@sentry/browser (incl. Tracing)	44.2 kB	-	-
@sentry/browser (incl. Tracing + Span Streaming)	47.69 kB	+2.73%	+1.26 kB 🔺
@sentry/browser (incl. Tracing, Profiling)	49.16 kB	-	-
@sentry/browser (incl. Tracing, Replay)	83.58 kB	-	-
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	73.04 kB	-	-
@sentry/browser (incl. Tracing, Replay with Canvas)	88.26 kB	-	-
@sentry/browser (incl. Tracing, Replay, Feedback)	100.87 kB	-	-
@sentry/browser (incl. Feedback)	43.47 kB	-	-
@sentry/browser (incl. sendFeedback)	31.12 kB	-	-
@sentry/browser (incl. FeedbackAsync)	36.21 kB	-	-
@sentry/browser (incl. Metrics)	27.62 kB	-	-
@sentry/browser (incl. Logs)	27.75 kB	-	-
@sentry/browser (incl. Metrics & Logs)	28.45 kB	-	-
@sentry/react	28.05 kB	-	-
@sentry/react (incl. Tracing)	46.42 kB	-	-
@sentry/vue	31.18 kB	-	-
@sentry/vue (incl. Tracing)	46.04 kB	-	-
@sentry/svelte	26.34 kB	-	-
CDN Bundle	28.91 kB	-	-
CDN Bundle (incl. Tracing)	48.22 kB	+2.71%	+1.27 kB 🔺
CDN Bundle (incl. Logs, Metrics)	30.34 kB	-	-
CDN Bundle (incl. Tracing, Logs, Metrics)	49.32 kB	+2.61%	+1.25 kB 🔺
CDN Bundle (incl. Replay, Logs, Metrics)	69.41 kB	-	-
CDN Bundle (incl. Tracing, Replay)	85.34 kB	+1.47%	+1.23 kB 🔺
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)	86.38 kB	+1.44%	+1.22 kB 🔺
CDN Bundle (incl. Tracing, Replay, Feedback)	91.14 kB	+1.38%	+1.24 kB 🔺
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)	92.23 kB	+1.34%	+1.22 kB 🔺
CDN Bundle - uncompressed	84.72 kB	-	-
CDN Bundle (incl. Tracing) - uncompressed	144.41 kB	+2.93%	+4.1 kB 🔺
CDN Bundle (incl. Logs, Metrics) - uncompressed	88.92 kB	-	-
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed	147.87 kB	+2.86%	+4.1 kB 🔺
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed	212.86 kB	-	-
CDN Bundle (incl. Tracing, Replay) - uncompressed	262.21 kB	+1.59%	+4.1 kB 🔺
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed	265.65 kB	+1.57%	+4.1 kB 🔺
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	275.92 kB	+1.52%	+4.11 kB 🔺
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed	279.35 kB	+1.5%	+4.11 kB 🔺
@sentry/nextjs (client)	48.92 kB	-	-
@sentry/sveltekit (client)	44.67 kB	-	-
@sentry/node-core	59.37 kB	+0.42%	+248 B 🔺
@sentry/node	170.79 kB	+0.14%	+234 B 🔺
@sentry/node - without tracing	98.02 kB	+0.89%	+863 B 🔺
@sentry/aws-serverless	114.25 kB	+0.26%	+286 B 🔺
@sentry/cloudflare (withSentry) - minified	166.19 kB	+0.6%	+990 B 🔺
@sentry/cloudflare (withSentry)	420.39 kB	+0.65%	+2.68 kB 🔺

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