blobStore: Directory tagging

[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

❌ Patch coverage is 72.41379% with 16 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.11%. Comparing base (ce4f06c) to head (d4a779b).
⚠️ Report is 22 commits behind head on main.

Files with missing lines	Patch %	Lines
.../multicloudj/blob/aws/async/AwsAsyncBlobStore.java	72.41%	7 Missing and 1 partial ⚠️
...alesforce/multicloudj/blob/aws/AwsTransformer.java	66.66%	4 Missing and 3 partials ⚠️
.../salesforce/multicloudj/blob/gcp/GcpBlobStore.java	85.71%	0 Missing and 1 partial ⚠️

❌ Your patch status has failed because the patch coverage (72.41%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #217      +/-   ##
============================================
- Coverage     83.21%   83.11%   -0.10%     
- Complexity       91       94       +3     
============================================
  Files           150      151       +1     
  Lines          8190     8249      +59     
  Branches        950      959       +9     
============================================
+ Hits           6815     6856      +41     
- Misses          925      937      +12     
- Partials        450      456       +6     

Flag	Coverage Δ
unittests	83.11% <72.41%> (-0.10%)	⬇️

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