Fix BSC VDisk metrics unknown fields exchange

[alexvru]

Changelog entry

Fix BSC VDisk metrics unknown fields exchange

Changelog category

• Not for changelog (changelog entry is not required)

Description for reviewers

This fixes accidental leaking of VDiskMetrics on previous versions of BSC receiving modern VDisk metrics due to presence of unknown fields.

[github-actions]

🟢 2025-05-05 14:31:39 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-05-05 11:12:49 UTC Pre-commit check linux-x86_64-release-asan for 6710092 has started.
⚪ 2025-05-05 11:13:00 UTC Artifacts will be uploaded here
⚪ 2025-05-05 11:16:08 UTC ya make is running...
🔴 2025-05-05 11:37:31 UTC Build failed, see the logs. Also see fail summary

[github-actions]

⚪ 2025-05-05 11:42:45 UTC Pre-commit check linux-x86_64-relwithdebinfo for 6710092 has started.
⚪ 2025-05-05 11:42:56 UTC Artifacts will be uploaded here
⚪ 2025-05-05 11:46:05 UTC ya make is running...
🔴 2025-05-05 11:57:20 UTC Build failed, see the logs. Also see fail summary

[github-actions]

⚪ 2025-05-05 12:29:11 UTC Pre-commit check linux-x86_64-release-asan for cd43b19 has started.
⚪ 2025-05-05 12:29:21 UTC Artifacts will be uploaded here
⚪ 2025-05-05 12:32:27 UTC ya make is running...
🟡 2025-05-05 14:32:40 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
14878	14697	0	112	41	28

⚪ 2025-05-05 14:33:54 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-05-05 15:00:20 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

Test history | Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
1011 (only retried tests)	894	0	55	36	26

⚪ 2025-05-05 15:00:32 UTC ya make is running... (failed tests rerun, try 3)
🟡 2025-05-05 15:25:44 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Test history | Ya make output | Test bloat | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
840 (only retried tests)	737	0	46	31	26

🟢 2025-05-05 15:25:54 UTC Build successful.
🔴 2025-05-05 15:26:25 UTC ydbd size 3.8 GiB changed* by +4.6 MiB, which is >= 2.0 MiB vs main: Alert

ydbd size dash	main: 71218f4	merge: cd43b19	diff	diff %
ydbd size	4 121 683 000 Bytes	4 126 496 960 Bytes	+4.6 MiB	+0.117%
ydbd stripped size	1 429 119 256 Bytes	1 433 271 064 Bytes	+4.0 MiB	+0.291%

^{*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]

⚪ 2025-05-05 12:43:48 UTC Pre-commit check linux-x86_64-relwithdebinfo for cd43b19 has started.
⚪ 2025-05-05 12:44:16 UTC Artifacts will be uploaded here
⚪ 2025-05-05 12:48:10 UTC ya make is running...
🟡 2025-05-05 14:40:25 UTC Some tests failed, follow the links below. Going to retry failed tests...

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
29702	27015	0	4	2635	48

⚪ 2025-05-05 14:42:49 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-05-05 15:08:36 UTC Some tests failed, follow the links below. Going to retry failed tests...

Test history | Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
729 (only retried tests)	693	0	1	0	35

⚪ 2025-05-05 15:08:46 UTC ya make is running... (failed tests rerun, try 3)
🟢 2025-05-05 15:33:32 UTC Tests successful.

Test history | Ya make output | Test bloat | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
118 (only retried tests)	85	0	0	0	33

🟢 2025-05-05 15:33:38 UTC Build successful.
🟢 2025-05-05 15:34:01 UTC ydbd size 2.2 GiB changed* by +37.6 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: a8596d8	merge: cd43b19	diff	diff %
ydbd size	2 343 324 672 Bytes	2 343 363 208 Bytes	+37.6 KiB	+0.002%
ydbd stripped size	493 063 040 Bytes	493 066 496 Bytes	+3.4 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}