Add missing author extension for items with Population Context Extension

[barhodes]

When populating an item with the SDC Questionnaire Item Population Context extension no QuestionnaireResponse Author extension was being added denoting that the item had been answered by CQL Evaluation.

[github-actions]

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[codecov]

Codecov Report

Attention: Patch coverage is 92.85714% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 53.32%. Comparing base (baa2cda) to head (232ebad).

Files	Patch %	Lines
...questionnaire/populate/ProcessItemWithContext.java	83.33%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #436      +/-   ##
============================================
+ Coverage     53.29%   53.32%   +0.02%     
- Complexity     2133     2134       +1     
============================================
  Files           281      281              
  Lines         11837    11843       +6     
  Branches       1618     1619       +1     
============================================
+ Hits           6309     6315       +6     
+ Misses         4913     4912       -1     
- Partials        615      616       +1     

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