improve tracing

[adameat]

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Description for reviewers

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[github-actions]

⚪ 2025-12-23 12:21:39 UTC Pre-commit check linux-x86_64-relwithdebinfo for 5e19c8e has started.
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⚫ 2025-12-23 14:11:35 UTC Check cancelled

[ydbot]

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[github-actions]

🟢 2025-12-23 12:24:39 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-12-23 12:24:42 UTC Pre-commit check linux-x86_64-release-asan for 5e19c8e has started.
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⚪ 2025-12-23 12:27:09 UTC ya make is running...
🟡 2025-12-23 14:05:46 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
15487	15260	0	121	83	23

🟢 2025-12-23 14:05:57 UTC Build successful.
🟢 2025-12-23 14:06:30 UTC ydbd size 3.8 GiB changed* by +25.9 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: 32b9546	merge: 5e19c8e	diff	diff %
ydbd size	4 086 616 408 Bytes	4 086 642 944 Bytes	+25.9 KiB	+0.001%
ydbd stripped size	1 530 291 544 Bytes	1 530 302 360 Bytes	+10.6 KiB	+0.001%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[Copilot]

Pull request overview

This PR improves distributed tracing support in the HTTP cache actors by integrating Wilson tracing spans. The changes enable request tracing through cache layers by propagating trace context via OpenTelemetry-compatible headers and tracking cache operations as trace spans.

Key changes:

• Added Wilson tracing span support to both incoming and outgoing HTTP cache actors
• Modified Duplicate() methods across HTTP request/response classes to accept optional extra headers for trace propagation
• Extended StatusSuccess() to include 1xx responses in addition to 2xx responses

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
ydb/library/actors/http/http_cache.cpp	Added Wilson tracing integration with SetupTracing methods, TRequest structs bundling requests with spans, span lifecycle management throughout cache operations, and trace header propagation
ydb/library/actors/http/http.h	Updated Duplicate method signatures to accept optional extraHeaders parameter; made THttpIncomingRequest::Duplicate const-correct
ydb/library/actors/http/http.cpp	Reimplemented Duplicate methods to rebuild HTTP messages from scratch while merging extra headers, enabling proper trace header injection

---

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[github-actions]

⚪ 2025-12-23 14:12:38 UTC Pre-commit check linux-x86_64-relwithdebinfo for 3721e81 has started.
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⚪ 2025-12-23 14:15:22 UTC ya make is running...
🟡 2025-12-23 16:42:27 UTC Some tests failed, follow the links below. Going to retry failed tests...

Details

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
45951	42363	0	183	3378	27

⚪ 2025-12-23 16:42:44 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-12-23 17:15:43 UTC Tests successful.

Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
1839 (only retried tests)	1828	0	0	0	11

🟢 2025-12-23 17:15:49 UTC Build successful.
🟢 2025-12-23 17:16:14 UTC ydbd size 2.3 GiB changed* by +11.0 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: 54d3846	merge: 3721e81	diff	diff %
ydbd size	2 486 506 360 Bytes	2 486 517 624 Bytes	+11.0 KiB	+0.000%
ydbd stripped size	529 305 024 Bytes	529 305 728 Bytes	+704 Bytes	+0.000%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[github-actions]

⚪ 2025-12-23 14:15:13 UTC Pre-commit check linux-x86_64-release-asan for 3721e81 has started.
⚪ 2025-12-23 14:15:32 UTC Artifacts will be uploaded here
⚪ 2025-12-23 14:17:40 UTC ya make is running...
🟡 2025-12-23 15:59:36 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
15249	15149	0	68	18	14

🟢 2025-12-23 15:59:47 UTC Build successful.
🟢 2025-12-23 16:00:19 UTC ydbd size 3.8 GiB changed* by +25.8 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: 54d3846	merge: 3721e81	diff	diff %
ydbd size	4 086 771 216 Bytes	4 086 797 672 Bytes	+25.8 KiB	+0.001%
ydbd stripped size	1 530 337 880 Bytes	1 530 348 632 Bytes	+10.5 KiB	+0.001%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[ydbot]

Backport

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Branch	Run
stable-25-2, stable-25-2-1, stable-25-3, stable-25-3-1
stable-25-3, stable-25-3-1
stable-25-3