feat: Centralize Event Buffers

[metal-messiah]

Standardize and centralize the event buffer pattern across all features, to allow for consistent storage, harvesting, and cache management.

Overview

All features would now have a standard way to store event data. And external (future) modules would have a standard way to access that data, through the runtime event manager object. All data stores are size-managed by the existing event-buffer class, which makes managing the data constraints and short-circuits easier.

Related Issue(s)

This was generated from innovation work

Testing

Tests have had a major overhaul to support the change to the event buffer pattern

[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	30.69 kB / 11.1 kB (gzip)	30.68 kB / 11.13 kB (gzip)	-0.04% / 0.23% (gzip)
lite	async-chunk	50.27 kB / 16.33 kB (gzip)	50.35 kB / 16.38 kB (gzip)	0.16% / 0.29% (gzip)
pro	loader	51.33 kB / 17.72 kB (gzip)	51.28 kB / 17.75 kB (gzip)	-0.09% / 0.15% (gzip)
pro	async-chunk	96.81 kB / 29.3 kB (gzip)	96.45 kB / 29.17 kB (gzip)	-0.37% / -0.42% (gzip)
spa	loader	58.98 kB / 20.1 kB (gzip)	58.93 kB / 20.11 kB (gzip)	-0.09% / 0.07% (gzip)
spa	async-chunk	111.87 kB / 33.64 kB (gzip)	111.5 kB / 33.51 kB (gzip)	-0.34% / -0.4% (gzip)

[codecov]

Codecov Report

Attention: Patch coverage is 90.32258% with 9 lines in your changes missing coverage. Please review.

Project coverage is 90.72%. Comparing base (b12131c) to head (53b7cc7).
Report is 17 commits behind head on main.

Files with missing lines	Patch %	Lines
src/features/page_view_timing/aggregate/index.js	44.44%	2 Missing and 3 partials ⚠️
src/features/logging/aggregate/index.js	83.33%	1 Missing and 1 partial ⚠️
src/features/ajax/aggregate/index.js	90.90%	0 Missing and 1 partial ⚠️
src/features/jserrors/instrument/index.js	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1171      +/-   ##
==========================================
+ Coverage   88.45%   90.72%   +2.27%     
==========================================
  Files         165      161       -4     
  Lines        7249     7065     -184     
  Branches     1484     1397      -87     
==========================================
- Hits         6412     6410       -2     
+ Misses        716      574     -142     
+ Partials      121       81      -40     

Flag	Coverage Δ
integration-tests	91.68% <100.00%> (-0.01%)	⬇️
unit-tests	83.85% <83.90%> (+4.99%)	⬆️

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[github-actions]

Last ran on September 12, 2024 21:59:58 CDT
Checking merge of (53b7cc7) into main (b12131c)

[metal-messiah]

putting back into draft mode until CDD is agreed upon