fix: propagate base64 from workspace Cargo.toml

[Farhad-Shabani]

Closes: #1084

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PR author checklist:

• Added changelog entry, using unclog.
• Linked to GitHub issue.
• Tagged one reviewer who will be the one responsible for shepherding this PR.

Reviewer checklist:

• Reviewed Files changed in the GitHub PR explorer.
• Manually tested (in case integration/unit/mock tests are absent).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (cf82f2a) 66.81% compared to head (d173f7e) 66.81%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1085   +/-   ##
=======================================
  Coverage   66.81%   66.81%           
=======================================
  Files         204      204           
  Lines       20437    20437           
=======================================
  Hits        13654    13654           
  Misses       6783     6783           

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