identify each request in update test using a query timestamp

[dprotaso]

This helps with debugging

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.41%. Comparing base (75762ca) to head (c5ee768).
Report is 10 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #967      +/-   ##
==========================================
- Coverage   93.43%   93.41%   -0.02%     
==========================================
  Files          36       36              
  Lines        1249     1003     -246     
==========================================
- Hits         1167      937     -230     
+ Misses         69       53      -16     
  Partials       13       13              

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[ReToCode]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dprotaso, ReToCode

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