feat: move tracing to rely on ctx

[giortzisg]

Description

Issues

• resolves: Refactor scope propagation to rely on context.Context #1367
• resolves: GO-154

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Reminders

• Add GH Issue ID & Linear ID
• PR title should use conventional commit style (feat:, fix:, ref:, meta:)
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[linear-code]

GO-154

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[cursor]

Hub baggage empty for new traces

High Severity

Removing scope SetSpan means hub.GetBaggage() no longer goes through span.ToBaggage() and only reads the propagation context DSC. For head-of-trace transactions that DSC is still empty when StartSpan copies it onto the scope, so GetBaggage() returns an empty string. Documented outgoing propagation and the no-span httpclient fallback then omit Sentry baggage, breaking downstream dynamic sampling.

Additional Locations (1)

• tracing.go#L206-L214

 

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