blobstore: Objectlock conformance

[LihaoLiuXs]

Summary

< Provide a brief description of the changes in this PR >

Some conventions to follow

1. add the module name as a prefix
   • for example: add a prefix: docstore: for document store module, blobstore for Blob Store module
2. for a test only PR, add test:
3. for a perf improvement only PR, add perf:
4. for a refactoring only PR, add "refactor:"

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.36%. Comparing base (03f6a8c) to head (72c1e13).

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #336   +/-   ##
=========================================
  Coverage     82.36%   82.36%           
  Complexity      625      625           
=========================================
  Files           191      191           
  Lines         11503    11503           
  Branches       1525     1525           
=========================================
  Hits           9475     9475           
- Misses         1357     1358    +1     
+ Partials        671      670    -1     

Flag	Coverage Δ
unittests	82.36% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.