feat(storage,config): open thin SD file

[dan-starkware]

Pull Request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build-related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this introduce a breaking change?

• Yes
• No

Other information

---

This change is 

[codecov]

Codecov Report

Merging #1249 (c4f6151) into main (58dba19) will decrease coverage by 0.42%.
Report is 20 commits behind head on main.
The diff coverage is 91.37%.

@@            Coverage Diff             @@
##             main    #1249      +/-   ##
==========================================
- Coverage   71.69%   71.28%   -0.42%     
==========================================
  Files          82       82              
  Lines        7851     7974     +123     
  Branches     7851     7974     +123     
==========================================
+ Hits         5629     5684      +55     
- Misses       1315     1378      +63     
- Partials      907      912       +5     

Files	Coverage Δ
crates/papyrus_storage/src/db/mod.rs	83.00% <ø> (ø)
crates/papyrus_storage/src/mmap_file/mod.rs	80.73% <96.15%> (+13.29%)	⬆️
crates/papyrus_storage/src/utils.rs	56.25% <0.00%> (ø)
crates/papyrus_storage/src/lib.rs	64.70% <90.32%> (+5.50%)	⬆️

... and 7 files with indirect coverage changes

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