feat: Add websocket init config

[ellisong]

Adds web_sockets block to NREUM init configuration. Setting web_sockets.enabled to true turns on the web sockets feature. The web sockets feature is disabled by default.

Overview

Adds web_sockets configuration in the init block to turn on the web sockets feature. It can also be turned on through the websockets feature flag.

Related Issue(s)

JIRA: https://new-relic.atlassian.net/browse/NR-553178

Testing

Make sure tests pass, especially the library tests.

[github-actions]

Supportability Metric Usage Changes:

No matching changes found

Supportability Metrics .md File Changes:

supportability_metrics.md was changed? false

New supportability metrics require changes to supportability_metrics.md, as well as a new PR to Angler. Please ensure an Angler PR is created and linked to this PR.

[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	26.94 kB / 10.27 kB (gzip)	26.88 kB / 10.27 kB (gzip)	-0.23% / 0.01% (gzip)
lite	async-chunk	59.66 kB / 20.07 kB (gzip)	59.62 kB / 20.05 kB (gzip)	-0.07% / -0.06% (gzip)
pro	loader	69.28 kB / 24.34 kB (gzip)	70.39 kB / 24.72 kB (gzip)	1.6% / 1.53% (gzip)
pro	async-chunk	97.22 kB / 30.83 kB (gzip)	97.2 kB / 30.84 kB (gzip)	-0.01% / 0.04% (gzip)
spa	loader	71.68 kB / 25.1 kB (gzip)	72.78 kB / 25.48 kB (gzip)	1.55% / 1.51% (gzip)
spa	async-chunk	109.36 kB / 34.03 kB (gzip)	109.35 kB / 34.03 kB (gzip)	-0.01% / 0.02% (gzip)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.12%. Comparing base (d75f4bf) to head (8b6e489).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1803      +/-   ##
==========================================
+ Coverage   90.09%   90.12%   +0.03%     
==========================================
  Files         214      215       +1     
  Lines        7852     7972     +120     
  Branches     1669     1707      +38     
==========================================
+ Hits         7074     7185     +111     
- Misses        708      716       +8     
- Partials       70       71       +1     

Flag	Coverage Δ
unit-tests	86.19% <100.00%> (+0.13%)	⬆️

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[github-actions]

Last ran on June 30, 2026 14:31:59 CDT
Checking merge of (05ca1e0) into main (eed67ae)

[metal-messiah]

Can you also update the flag/init for

• publish-experiment.yml
• internal-promotion > released.js <-- I think we should be ok to expose this to NR1 at this point