feat: Add rum-response metadata handler

[metal-messiah]

The initial connect call can now supply browser app metadata. This adds a handler to store and use that metadata for future harvests.

Overview

This PR introduces a handler for the agent metadata response from the RUM call. This will initially contain a real entityGuid for the browser app, regardless if it was APM injected or standalone. The entityGuid implementations will be introduced in subsequent PRs, as it will be applied to SR, ST and Logs payloads in the future.

Related Issue(s)

NR-215487

Testing

A new test has been added to account for the rum-supplied app id.

[github-actions]

Last ran on March 08, 2024 17:15:11 CST
Checking merge of (433915d) into main (dfdbaab)

[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	32.46 kB / 11.31 kB (gzip)	32.48 kB / 11.32 kB (gzip)	0.05% / 0.08% (gzip)
lite	async-chunk	46.45 kB / 15.27 kB (gzip)	46.48 kB / 15.3 kB (gzip)	0.08% / 0.14% (gzip)
pro	loader	51.63 kB / 17.54 kB (gzip)	51.64 kB / 17.55 kB (gzip)	0.03% / 0.05% (gzip)
pro	async-chunk	87.67 kB / 26.96 kB (gzip)	87.79 kB / 27.01 kB (gzip)	0.13% / 0.17% (gzip)
spa	loader	60.2 kB / 20.16 kB (gzip)	60.21 kB / 20.17 kB (gzip)	0.02% / 0.04% (gzip)
spa	async-chunk	101.79 kB / 31.1 kB (gzip)	101.9 kB / 31.14 kB (gzip)	0.11% / 0.15% (gzip)
lite-polyfills	loader	128.8 kB / 41.08 kB (gzip)	128.82 kB / 41.1 kB (gzip)	0.01% / 0.03% (gzip)
lite-polyfills	async-chunk	58.81 kB / 17.4 kB (gzip)	58.99 kB / 17.47 kB (gzip)	0.31% / 0.4% (gzip)
pro-polyfills	loader	148.83 kB / 47.04 kB (gzip)	148.85 kB / 47.04 kB (gzip)	0.01% / 0.01% (gzip)
pro-polyfills	async-chunk	121.11 kB / 31.83 kB (gzip)	121.29 kB / 31.91 kB (gzip)	0.15% / 0.27% (gzip)
spa-polyfills	loader	156.85 kB / 49.14 kB (gzip)	156.87 kB / 49.15 kB (gzip)	0.01% / 0.02% (gzip)
spa-polyfills	async-chunk	136.46 kB / 36.5 kB (gzip)	136.64 kB / 36.57 kB (gzip)	0.13% / 0.2% (gzip)

[codecov]

Codecov Report

Attention: Patch coverage is 40.00000% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 80.40%. Comparing base (4081c03) to head (ad685ad).

Files	Patch %	Lines
src/features/page_view_event/aggregate/index.js	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #913      +/-   ##
==========================================
- Coverage   80.42%   80.40%   -0.02%     
==========================================
  Files         154      154              
  Lines        7044     7048       +4     
  Branches     1386     1388       +2     
==========================================
+ Hits         5665     5667       +2     
- Misses       1163     1165       +2     
  Partials      216      216              

Flag	Coverage Δ
unit-tests	58.38% <40.00%> (-0.01%)	⬇️

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