POTEL 3 - Use OpenTelemetry in Sentry Performance API

[adinauer]

📜 Description

💡 Motivation and Context

💚 How did you test it?

📝 Checklist

• I reviewed the submitted code.
• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

🔮 Next steps

[github-actions]

	Fails
🚫	Please consider adding a changelog entry for the next release.

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Instructions and example for changelog

Please add an entry to CHANGELOG.md to the "Unreleased" section. Make sure the entry includes this PR's number.

Example:

## Unreleased

- POTEL 3 - Use OpenTelemetry in Sentry Performance API ([#3416](https://github.com/getsentry/sentry-java/pull/3416))

If none of the above apply, you can opt out of this check by adding #skip-changelog to the PR description.

Generated by 🚫 dangerJS against 0f22adb

[adinauer]

This is required to override the span factory when creating Sentry transactions in OTel SpanExporter to avoid endless loops.

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	398.25 ms	477.15 ms	78.90 ms
Size	1.70 MiB	2.28 MiB	596.83 KiB

Baseline results on branch: feat/potel-2-promote-span-attributes

Startup times

Revision	Plain	With Sentry	Diff
9cd6181	376.73 ms	459.41 ms	82.67 ms
9fdb8b8	365.10 ms	449.87 ms	84.77 ms

App size

Revision	Plain	With Sentry	Diff
9cd6181	1.70 MiB	2.28 MiB	596.17 KiB
9fdb8b8	1.70 MiB	2.28 MiB	596.01 KiB

Previous results on branch: feat/potel-3-use-otel-in-sentry-api

Startup times

Revision	Plain	With Sentry	Diff
0978e3b	424.86 ms	519.90 ms	95.04 ms

App size

Revision	Plain	With Sentry	Diff
0978e3b	1.70 MiB	2.28 MiB	596.24 KiB