update: datasafe-storage-api and improve test-coverage

[AssahBismarkabah]

update the datasafe-storage-api by enhancing the Readme, improving test coverage, and conducting thorough code review.

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 86.76%. Comparing base (89da57d) to head (296cb62).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #338 +/- ## ============================================= + Coverage 86.14% 86.76% +0.62% Complexity 1 1 ============================================= Files 165 165 Lines 3348 3348 Branches 217 217 ============================================= + Hits 2884 2905 +21 + Misses 330 309 -21 Partials 134 134 ```

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