Ensure index is copied as blob

[jonesbusy]

Description

Ensure index is copied as blob

Code is not ideal, but will be implemented on #190

Testing done

CI

Submitter checklist

• I have read and understood the CONTRIBUTING guide
• I have run mvn license:update-file-header, mvn spotless:apply, pre-commit run -a, mvn clean install before opening the PR

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.37%. Comparing base (13ef63d) to head (5130893).
Report is 2 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #196      +/-   ##
============================================
- Coverage     84.91%   84.37%   -0.54%     
+ Complexity      375      372       -3     
============================================
  Files            29       29              
  Lines          1286     1293       +7     
  Branches        137      138       +1     
============================================
- Hits           1092     1091       -1     
- Misses          131      135       +4     
- Partials         63       67       +4     

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