Add optional data validation to Storage LoadActor

[serbel324]

Changelog entry

Add ContentType option to load settings. When set to Validated it makes actor to validate read data from TEvGet's.

Changelog category

• Improvement

[github-actions]

⚪ 2025-10-23 12:40:31 UTC Pre-commit check linux-x86_64-relwithdebinfo for eda706f has started.
⚪ 2025-10-23 12:40:45 UTC Artifacts will be uploaded here
⚪ 2025-10-23 12:45:02 UTC ya make is running...
🟡 2025-10-23 15:12:33 UTC Some tests failed, follow the links below. Going to retry failed tests...

Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
41436	38616	0	8	2777	35

⚪ 2025-10-23 15:12:47 UTC ya make is running... (failed tests rerun, try 2)
🟢 2025-10-23 15:34:06 UTC Tests successful.

Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
896 (only retried tests)	872	0	0	0	24

🟢 2025-10-23 15:34:09 UTC Build successful.
🟢 2025-10-23 15:34:27 UTC ydbd size 2.3 GiB changed* by +23.5 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: 74cf4c1	merge: eda706f	diff	diff %
ydbd size	2 436 392 128 Bytes	2 436 416 176 Bytes	+23.5 KiB	+0.001%
ydbd stripped size	517 948 936 Bytes	517 952 296 Bytes	+3.3 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}

[github-actions]

⚪ 2025-10-23 12:41:10 UTC Pre-commit check linux-x86_64-release-asan for eda706f has started.
⚪ 2025-10-23 12:41:25 UTC Artifacts will be uploaded here
⚪ 2025-10-23 12:45:43 UTC ya make is running...
🟡 2025-10-23 15:44:33 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?
18125	17550	0	272	277	26

🟢 2025-10-23 15:44:40 UTC Build successful.
🟢 2025-10-23 15:45:04 UTC ydbd size 3.8 GiB changed* by +40.6 KiB, which is < 100.0 KiB vs main: OK

ydbd size dash	main: 74cf4c1	merge: eda706f	diff	diff %
ydbd size	4 053 820 208 Bytes	4 053 861 808 Bytes	+40.6 KiB	+0.001%
ydbd stripped size	1 505 358 464 Bytes	1 505 376 128 Bytes	+17.2 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}

[github-actions]

🟢 2025-10-23 12:43:11 UTC The validation of the Pull Request description is successful.