feat: Add measure support to register API

[metal-messiah]

Adds support for the measure API in the register response object. This is in support of the future micro front end offering planned.

Overview

Related Issue(s)

https://new-relic.atlassian.net/browse/NR-138366

Testing

Existing tests have been updated to account for the new expected data and interface typing definitions.

[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	25.96 kB / 9.8 kB (gzip)	25.96 kB / 9.8 kB (gzip)	0% / 0% (gzip)
lite	async-chunk	53.84 kB / 18.05 kB (gzip)	53.84 kB / 18.05 kB (gzip)	0% / 0% (gzip)
pro	loader	54.47 kB / 19.25 kB (gzip)	54.58 kB / 19.25 kB (gzip)	0.21% / 0.02% (gzip)
pro	async-chunk	92.5 kB / 29 kB (gzip)	92.5 kB / 29 kB (gzip)	0% / 0% (gzip)
spa	loader	63.32 kB / 21.94 kB (gzip)	63.44 kB / 21.94 kB (gzip)	0.18% / 0% (gzip)
spa	async-chunk	117.9 kB / 36.32 kB (gzip)	117.91 kB / 36.32 kB (gzip)	0% / 0% (gzip)

[codecov]

Codecov Report

❌ Patch coverage is 85.71429% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.43%. Comparing base (4137dcb) to head (25680c5).

Files with missing lines	Patch %	Lines
src/interfaces/registered-entity.js	0.00%	2 Missing ⚠️
src/features/generic_events/aggregate/index.js	50.00%	1 Missing ⚠️
src/loaders/api/register.js	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1623      +/-   ##
==========================================
- Coverage   88.47%   88.43%   -0.04%     
==========================================
  Files         206      206              
  Lines        7763     7766       +3     
  Branches     1593     1595       +2     
==========================================
  Hits         6868     6868              
- Misses        782      784       +2     
- Partials      113      114       +1     

Flag	Coverage Δ
unit-tests	81.67% <85.71%> (-0.05%)	⬇️

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[github-actions]

Last ran on November 06, 2025 10:37:14 CST
Checking merge of (25680c5) into main (4137dcb)