feat: Mfe refactor

[metal-messiah]

Please add a one-paragraph summary here, suitable for a release notes description. This will help with documentation.

Overview

Related Issue(s)

Testing

[github-actions]

Supportability Metric Usage Changes:

File	Content
src/features/utils/event-buffer.js	this.featureAgg?.reportSupportabilityMetric(smTag(this.featureAgg.featureName), addSize) // bytes dropped for this feature will aggregate with this metric tag
src/features/utils/event-buffer.js	this.featureAgg?.reportSupportabilityMetric(smTag(Combined), addSize) // all bytes dropped across all features will aggregate with this metric tag

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	25.55 kB / 9.65 kB (gzip)	25.53 kB / 9.64 kB (gzip)	-0.08% / -0.13% (gzip)
lite	async-chunk	52.6 kB / 17.45 kB (gzip)	50.04 kB / 16.68 kB (gzip)	-4.86% / -4.41% (gzip)
pro	loader	53.52 kB / 18.8 kB (gzip)	52.77 kB / 18.55 kB (gzip)	-1.39% / -1.3% (gzip)
pro	async-chunk	92 kB / 28.53 kB (gzip)	89.32 kB / 27.79 kB (gzip)	-2.91% / -2.6% (gzip)
spa	loader	62.28 kB / 21.52 kB (gzip)	61.53 kB / 21.25 kB (gzip)	-1.19% / -1.22% (gzip)
spa	async-chunk	116.7 kB / 35.51 kB (gzip)	113.95 kB / 34.76 kB (gzip)	-2.36% / -2.11% (gzip)

[codecov]

Codecov Report

Attention: Patch coverage is 80.18868% with 21 lines in your changes missing coverage. Please review.

Project coverage is 87.81%. Comparing base (def89c4) to head (0cc29eb).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
src/features/jserrors/aggregate/index.js	0.00%	7 Missing and 6 partials ⚠️
src/features/generic_events/aggregate/index.js	66.66%	3 Missing ⚠️
src/common/harvest/harvester.js	86.66%	1 Missing and 1 partial ⚠️
src/features/session_replay/aggregate/index.js	77.77%	2 Missing ⚠️
src/features/page_view_event/aggregate/index.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1495      +/-   ##
==========================================
+ Coverage   87.64%   87.81%   +0.17%     
==========================================
  Files         197      197              
  Lines        7778     7641     -137     
  Branches     1565     1532      -33     
==========================================
- Hits         6817     6710     -107     
+ Misses        827      807      -20     
+ Partials      134      124      -10     

Flag	Coverage Δ
unit-tests	79.39% <80.18%> (+0.61%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[github-actions]

Last ran on June 10, 2025 19:10:15 CDT
Checking merge of (b40e76a) into main (82b9f78)

[metal-messiah]

Needs confirmation from DEM platform and PM on the required payload items