feat: add httpx2 instrumentation

[HosseinNejatiJavaremi]

Summary

• Add httpx2 instrumentation mirroring existing httpx support
• Instrument httpx2.Client.send and httpx2.AsyncClient.send for external HTTP spans
• Instrument httpcore2 for distributed tracing header propagation
• Gate registration to Python 3.10+ (httpx2 requirement)
• Add tests, CI matrix entry, and supported-technologies docs

Closes #2696

Test plan

• pytest -m httpx2 tests/instrumentation/httpx2_tests.py tests/instrumentation/asyncio_tests/httpx2_tests.py (18 passed)

Made with Cursor

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🤖 GitHub comments

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[HosseinNejatiJavaremi]

CLA check is still failing on my side even after re-signing the Contributor Agreement with GitHub user HosseinNejatiJavaremi and email hosseinnejati14@gmail.com (same email as my merged PR #2682). Happy to re-sign or provide any extra info if needed.

Thanks for the review.

[xrmx]

@HosseinNejatiJavaremi as I said already please wait for feedback on the issue before opening PRs.

[HosseinNejatiJavaremi]

@xrmx Thanks for the feedback. I waited ~3 weeks on #2696 before opening the PR — httpx2 adoption is picking up and I wanted to help move it forward.

Happy to close the PR and follow your process on the issue.

If the supported path is now OpenTelemetry / EDOT for Python, I’d prefer to migrate there rather than invest more in this repo. If apm-agent-python is still the right place for httpx2, I’m happy to contribute — just need clarity on direction.

Thanks.

[xrmx]

@xrmx Thanks for the feedback. I waited ~3 weeks on #2696 before opening the PR — httpx2 adoption is picking up and I wanted to help move it forward.

Happy to close the PR and follow your process on the issue.

If the supported path is now OpenTelemetry / EDOT for Python, I’d prefer to migrate there rather than invest more in this repo. If apm-agent-python is still the right place for httpx2, I’m happy to contribute — just need clarity on direction.

Yeah, OpenTelemetry is the way forward and latest upstream release already supports httpx2 instrumentation. Next EDOT release rebased on top of that will also supports that. My suggestion is that if you can migrate please do since more work on newer instrumentations will go into OpenTelemetry