IWF-546: Add search attributes to IwfEvents

[lwolczynski]

Description

Checklist

• Code compiles correctly
• Tests for the changes have been added
• All tests passing
• This PR change is backwards-compatible
• This PR CONTAINS a (planned) breaking change (it is not backwards compatible)

Related Issue

Closes #issue_number

[codecov]

Codecov Report

Attention: Patch coverage is 92.50000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 64.69%. Comparing base (91788a0) to head (f558fd9).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
service/interpreter/activityImpl.go	62.50%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #539      +/-   ##
==========================================
+ Coverage   64.56%   64.69%   +0.13%     
==========================================
  Files          59       59              
  Lines        6617     6639      +22     
==========================================
+ Hits         4272     4295      +23     
+ Misses       2066     2065       -1     
  Partials      279      279              

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