[PersistentStorage.FileSystem] Nullable

[Kielek]

Towards: #894

Changes

[PersistentStorage.FileSystem] Nullable

For significant contributions please make sure you have completed the following items:

• [ ] Appropriate CHANGELOG.md updated for non-trivial changes
• [ ] Design discussion issue #
• [ ] Changes in public API reviewed

[codecov]

Codecov Report

Merging #1085 (85ed604) into main (8f8d153) will decrease coverage by 0.04%.
The diff coverage is n/a.

❗ Current head 85ed604 differs from pull request most recent head 3b08632. Consider uploading reports for the commit 3b08632 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1085      +/-   ##
==========================================
- Coverage   69.29%   69.26%   -0.04%     
==========================================
  Files         214      212       -2     
  Lines        8358     8332      -26     
==========================================
- Hits         5792     5771      -21     
+ Misses       2566     2561       -5     

Impacted Files	Coverage Δ
...Telemetry.PersistentStorage.FileSystem/FileBlob.cs	84.44% <ø> (+8.88%)	⬆️
...y.PersistentStorage.FileSystem/FileBlobProvider.cs	77.41% <ø> (+8.06%)	⬆️

... and 11 files with indirect coverage changes