ENH: Robustify on missing font for Tf operator in text_extract()

[pubpub-zz]

closes #2815

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.88%. Comparing base (b7b3c8c) to head (8c17a98).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2816      +/-   ##
==========================================
+ Coverage   95.86%   95.88%   +0.02%     
==========================================
  Files          51       51              
  Lines        8576     8576              
  Branches     1696     1696              
==========================================
+ Hits         8221     8223       +2     
+ Misses        212      210       -2     
  Partials      143      143              

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