chore: add OpenZeppelin and Spearbit audit PDFs

[ccashwell]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.39%. Comparing base (c84929a) to head (a570403).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #160   +/-   ##
=======================================
  Coverage   98.39%   98.39%           
=======================================
  Files          41       41           
  Lines        1809     1809           
  Branches       99       99           
=======================================
  Hits         1780     1780           
  Misses         29       29           

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