Fix incorrect Uuid serialization for CDC. (#12587)

[dcherednik]

TCell stores uuid as binary data therefore it can contains \0 byte.

Changelog category

• Bugfix

[github-actions]

⚪ 2024-12-13 10:43:06 UTC Pre-commit check for 58d7f6c has started.
⚪ 2024-12-13 10:45:41 UTC Build linux-x86_64-release-asan is running...
🟢 2024-12-13 11:08:27 UTC Build successful.
⚪ 2024-12-13 11:08:43 UTC Tests are running...
🔴 2024-12-13 13:09:48 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
10377	10292	0	17	25	43

🟢 2024-12-13 13:10:35 UTC ydbd size 5.6 GiB changed* by +2.9 KiB, which is < 100.0 KiB vs stream-nb-24-3: OK

ydbd size dash	stream-nb-24-3: c55c773	merge: 58d7f6c	diff	diff %
ydbd size	6 007 008 616 Bytes	6 007 011 576 Bytes	+2.9 KiB	+0.000%
ydbd stripped size	1 504 748 736 Bytes	1 504 750 208 Bytes	+1.4 KiB	+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]

⚪ 2024-12-13 10:44:52 UTC Pre-commit check for 58d7f6c has started.
⚪ 2024-12-13 10:48:08 UTC Build linux-x86_64-relwithdebinfo is running...
🟢 2024-12-13 11:29:22 UTC Build successful.
⚪ 2024-12-13 11:29:37 UTC Tests are running...
🔴 2024-12-13 13:09:31 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
14703	13337	0	10	1313	43

🟢 2024-12-13 13:10:20 UTC ydbd size 8.3 GiB changed* by -440 Bytes, which is <= 0 Bytes vs stream-nb-24-3: OK

ydbd size dash	stream-nb-24-3: c55c773	merge: 58d7f6c	diff	diff %
ydbd size	8 875 445 632 Bytes	8 875 445 192 Bytes	-440 Bytes	-0.000%
ydbd stripped size	483 978 056 Bytes	483 978 376 Bytes	+320 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}