Add timestamp in the received invocation logs

[hallvictoria]

Description

Added a UTC timestamp to the received invocation logs. Edited tests to check for updated log format.

Fixes #1337

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PR information

• The title of the PR is clear and informative.
• There are a small number of commits, each of which has an informative message. This means that previously merged commits do not appear in the history of the PR. For information on cleaning up the commits in your pull request, see this page.
• If applicable, the PR references the bug/issue that it fixes in the description.
• New Unit tests were added for the changes made and CI is passing.

Quality of Code and Contribution Guidelines

• I have read the contribution guidelines.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (f269c09) 85.81% compared to head (916056b) 85.31%.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #1378      +/-   ##
==========================================
- Coverage   85.81%   85.31%   -0.50%     
==========================================
  Files          35       35              
  Lines        1953     1955       +2     
  Branches      370      370              
==========================================
- Hits         1676     1668       -8     
- Misses        208      215       +7     
- Partials       69       72       +3     

Flag	Coverage Δ
unittests	85.26% <100.00%> (-0.50%)	⬇️

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