24-3-15: Return default decimal if scheme proto is empty

[azevaykin]

Changelog entry

Scheme proto propagation could be slow in some races and new code can return old proto. In this case we should not throw exception.

Changelog category

• Bugfix

Additional information

...

[github-actions]

⚪ 2025-01-20 08:52:27 UTC Pre-commit check for 779d15f has started.
⚪ 2025-01-20 08:55:06 UTC Build linux-x86_64-relwithdebinfo is running...
🟢 2025-01-20 09:35:49 UTC Build successful.
⚪ 2025-01-20 09:36:06 UTC Tests are running...
🔴 2025-01-20 11:25:07 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
39617	34345	0	17	5217	38

🟢 2025-01-20 11:25:48 UTC ydbd size 8.3 GiB changed* by -600 Bytes, which is <= 0 Bytes vs stable-24-3: OK

ydbd size dash	stable-24-3: 2257ad4	merge: 779d15f	diff	diff %
ydbd size	8 874 221 136 Bytes	8 874 220 536 Bytes	-600 Bytes	-0.000%
ydbd stripped size	484 292 680 Bytes	484 292 552 Bytes	-128 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]

⚪ 2025-01-20 08:52:37 UTC Pre-commit check for 779d15f has started.
⚪ 2025-01-20 08:55:15 UTC Build linux-x86_64-release-asan is running...
🟢 2025-01-20 09:18:53 UTC Build successful.
⚪ 2025-01-20 09:19:10 UTC Tests are running...
🔴 2025-01-20 11:22:28 UTC Some tests failed, follow the links below.

Test history | Test log

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
11045	10944	0	28	30	43

🟢 2025-01-20 11:23:19 UTC ydbd size 5.6 GiB changed* by -4.4 KiB, which is <= 0 Bytes vs stable-24-3: OK

ydbd size dash	stable-24-3: 2257ad4	merge: 779d15f	diff	diff %
ydbd size	6 002 552 696 Bytes	6 002 548 168 Bytes	-4.4 KiB	-0.000%
ydbd stripped size	1 504 212 960 Bytes	1 504 208 480 Bytes	-4.4 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}