POTEL 35 - Use OtelSpan name as fallback for transaction name

[lbloder]

📜 Description

Fallback to otelspan name as transaction description if sentry span description is null

💡 Motivation and Context

Avoid having <unlabeled transaction> as label in sentry.

💚 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]

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

Generated by 🚫 dangerJS against 29d1993

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	473.74 ms	584.28 ms	110.54 ms
Size	1.70 MiB	2.29 MiB	599.31 KiB

Baseline results on branch: 8.x.x

Startup times

Revision	Plain	With Sentry	Diff
a0f7731	357.02 ms	433.40 ms	76.38 ms
2f49b9c	416.54 ms	479.14 ms	62.60 ms
a59fca2	560.08 ms	658.80 ms	98.71 ms
57732e8	435.66 ms	510.50 ms	74.84 ms
ca82680	490.88 ms	631.67 ms	140.80 ms
41e496a	408.90 ms	491.32 ms	82.42 ms

App size

Revision	Plain	With Sentry	Diff
a0f7731	1.70 MiB	2.29 MiB	599.77 KiB
2f49b9c	1.70 MiB	2.29 MiB	599.31 KiB
a59fca2	1.70 MiB	2.29 MiB	599.77 KiB
57732e8	1.70 MiB	2.29 MiB	599.77 KiB
ca82680	1.70 MiB	2.29 MiB	599.31 KiB
41e496a	1.70 MiB	2.29 MiB	599.77 KiB

Previous results on branch: feat/POTEL-35-Transaction-Name-Fallback

Startup times

Revision	Plain	With Sentry	Diff
006be01	408.35 ms	486.96 ms	78.61 ms

App size

Revision	Plain	With Sentry	Diff
006be01	1.70 MiB	2.29 MiB	599.31 KiB

[adinauer]

LGTM, just needs a changelog entry