Set credentialRequestOrigin in fake CHAPI event for scanner.

[dlongley]

• The CHAPI event should be removed and a ClientInteraction used instead in the future.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 12.04%. Comparing base (2621ed2) to head (cf09d75).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #130   +/-   ##
=======================================
  Coverage   12.04%   12.04%           
=======================================
  Files           6        6           
  Lines          83       83           
=======================================
  Hits           10       10           
  Misses         73       73           

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