chore: Audit timestamp flooring

[cwli24]

---

Overview

Clean up some usage of double precision performance.now() and make UI event soft navigations work with ms granularity.

Related Issue(s)

https://new-relic.atlassian.net/browse/NR-253743

Testing

[github-actions]

Asset Size Report

Merging this pull request will result in the following asset size changes:

Agent	Asset	Previous Size	New Size	Diff
lite	loader	31.44 kB / 11.02 kB (gzip)	31.44 kB / 11.03 kB (gzip)	-0.02% / 0.07% (gzip)
lite	async-chunk	50.97 kB / 16.57 kB (gzip)	50.96 kB / 16.56 kB (gzip)	-0.01% / -0.02% (gzip)
pro	loader	52.7 kB / 17.86 kB (gzip)	52.7 kB / 17.87 kB (gzip)	-0.01% / 0.04% (gzip)
pro	async-chunk	93.48 kB / 28.21 kB (gzip)	93.43 kB / 28.2 kB (gzip)	-0.04% / -0.03% (gzip)
spa	loader	60.82 kB / 20.36 kB (gzip)	60.81 kB / 20.37 kB (gzip)	-0.01% / 0.05% (gzip)
spa	async-chunk	108.74 kB / 32.65 kB (gzip)	108.7 kB / 32.63 kB (gzip)	-0.04% / -0.06% (gzip)
lite-polyfills	loader	125.46 kB / 40.31 kB (gzip)	125.44 kB / 40.32 kB (gzip)	-0.01% / 0.02% (gzip)
lite-polyfills	async-chunk	65.71 kB / 18.91 kB (gzip)	65.7 kB / 18.9 kB (gzip)	-0.01% / -0.02% (gzip)
pro-polyfills	loader	147.17 kB / 46.57 kB (gzip)	147.15 kB / 46.58 kB (gzip)	-0.01% / 0.02% (gzip)
pro-polyfills	async-chunk	113.98 kB / 30.16 kB (gzip)	113.94 kB / 30.14 kB (gzip)	-0.03% / -0.05% (gzip)
spa-polyfills	loader	155.36 kB / 48.75 kB (gzip)	155.35 kB / 48.75 kB (gzip)	-0.01% / -0.01% (gzip)
spa-polyfills	async-chunk	130.98 kB / 34.79 kB (gzip)	130.94 kB / 34.77 kB (gzip)	-0.03% / -0.04% (gzip)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.14%. Comparing base (55b0e00) to head (2349a1c).
Report is 10 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1022      +/-   ##
==========================================
+ Coverage   86.99%   87.14%   +0.14%     
==========================================
  Files         156      156              
  Lines        7087     7084       -3     
  Branches     1397     1413      +16     
==========================================
+ Hits         6165     6173       +8     
+ Misses        800      787      -13     
- Partials      122      124       +2     

Flag	Coverage Δ
unit-tests	75.31% <100.00%> (-0.29%)	⬇️

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[github-actions]

Last ran on May 13, 2024 09:49:48 CDT
Checking merge of (410a599) into main (55b0e00)

[patrickhousley]

Test failures need to be looked at.