feat: Calculate New Relic time in the agent

[patrickhousley]

Migrating the process of time-stamping harvested data to the agent. The agent will utilize the date and time reported by the ingest pipeline during the RUM call as well as browser network and timing stats to derive a server time offset that can be applied to harvested data as event occur. This will improve the ability to visualize the harvested data on a timeline within New Relic UI.

Overview

Adding a new time keeper class to the agent that will utilize the RUM network call and the resource performance APIs to calculate the server time offset. This can then be used by features and other aspects of the agent to correct an absolute timestamp from browser time to server time and convert a time value relative to page origin to a timestamp that accounts for the server time offset.

Related Issue(s)

https://new-relic.atlassian.net/browse/NR-222414

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	32.24 kB / 11.17 kB (gzip)	32.46 kB / 11.31 kB (gzip)	0.69% / 1.28% (gzip)
lite	async-chunk	46.11 kB / 15.13 kB (gzip)	46.45 kB / 15.27 kB (gzip)	0.74% / 0.98% (gzip)
pro	loader	51.45 kB / 17.39 kB (gzip)	51.63 kB / 17.54 kB (gzip)	0.34% / 0.85% (gzip)
pro	async-chunk	87.32 kB / 26.8 kB (gzip)	87.67 kB / 26.96 kB (gzip)	0.41% / 0.6% (gzip)
spa	loader	60.1 kB / 20.01 kB (gzip)	60.2 kB / 20.16 kB (gzip)	0.17% / 0.79% (gzip)
spa	async-chunk	101.44 kB / 30.94 kB (gzip)	101.79 kB / 31.1 kB (gzip)	0.35% / 0.5% (gzip)
lite-polyfills	loader	127.67 kB / 40.65 kB (gzip)	128.8 kB / 41.08 kB (gzip)	0.89% / 1.08% (gzip)
lite-polyfills	async-chunk	58.49 kB / 17.23 kB (gzip)	58.81 kB / 17.4 kB (gzip)	0.55% / 0.96% (gzip)
pro-polyfills	loader	147.77 kB / 46.6 kB (gzip)	148.83 kB / 47.04 kB (gzip)	0.72% / 0.94% (gzip)
pro-polyfills	async-chunk	120.76 kB / 31.65 kB (gzip)	121.11 kB / 31.83 kB (gzip)	0.29% / 0.55% (gzip)
spa-polyfills	loader	155.9 kB / 48.71 kB (gzip)	156.85 kB / 49.14 kB (gzip)	0.61% / 0.87% (gzip)
spa-polyfills	async-chunk	136.11 kB / 36.33 kB (gzip)	136.46 kB / 36.5 kB (gzip)	0.25% / 0.45% (gzip)

[github-actions]

Last ran on March 15, 2024 15:31:37 CDT
Checking merge of (22612c3) into main (a52c57b)

[codecov]

Codecov Report

Attention: Patch coverage is 81.15942% with 13 lines in your changes are missing coverage. Please review.

Project coverage is 80.42%. Comparing base (a52c57b) to head (22612c3).

Files	Patch %	Lines
src/features/page_view_event/aggregate/index.js	0.00%	9 Missing ⚠️
src/common/timing/time-keeper.js	92.85%	3 Missing ⚠️
src/common/wrap/wrap-fetch.js	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #911      +/-   ##
==========================================
+ Coverage   80.19%   80.42%   +0.22%     
==========================================
  Files         154      154              
  Lines        7010     7044      +34     
  Branches     1389     1386       -3     
==========================================
+ Hits         5622     5665      +43     
+ Misses       1170     1163       -7     
+ Partials      218      216       -2     

Flag	Coverage Δ
integration-tests	89.77% <75.00%> (-0.10%)	⬇️
unit-tests	58.38% <80.70%> (+0.45%)	⬆️

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[metal-messiah]

General concept looks good, g2g when tests are done