fix: use monotonic clock for timing code

[ankush]

time.time() depends on system clock which can drift away and get corrected
over time. If you're unlucky it will get corrected in your timing code
and give absurd results.

https://docs.python.org/3/library/time.html#time.monotonic

[codecov]

Codecov Report

Merging #19138 (9bdfd07) into develop (9e91f20) will decrease coverage by 0.01%.
The diff coverage is 60.00%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #19138      +/-   ##
===========================================
- Coverage    63.72%   63.70%   -0.02%     
===========================================
  Files          750      750              
  Lines        67710    67710              
  Branches      6042     6042              
===========================================
- Hits         43145    43137       -8     
- Misses       21135    21143       +8     
  Partials      3430     3430              

Flag	Coverage Δ
server-postgres	67.59% <60.00%> (-0.04%)	⬇️

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