feat: Retry initial connect call

[metal-messiah]

To help prevent data loss, the agent will now retry the original "RUM" call an extra time for retryable status codes.

Overview

Related Issue(s)

Angler PR

https://source.datanerd.us/agents/angler/pull/757

Issue

https://new-relic.atlassian.net/browse/NR-137656?atlOrigin=eyJpIjoiNjI5ODU3OTNkMDA3NDk3ZTg5ODk2YzEwYjgzMjQxNjciLCJwIjoiaiJ9

Testing

New tests have been added to ensure the RUM request is retried and is identical, and subsequent feature will harvest.

[github-actions]

Supportability Metric Usage Changes:

File	Content
src/common/harvest/harvester.js	const reportSM = (message) => handle(SUPPORTABILITY_METRIC_CHANNEL, [message], undefined, FEATURE_NAMES.metrics, aggregateInst.ee)

Supportability Metrics .md File Changes:

supportability_metrics.md was changed? true

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% / -0.03% (gzip)
lite	async-chunk	53.84 kB / 18.05 kB (gzip)	54.01 kB / 18.09 kB (gzip)	0.31% / 0.23% (gzip)
pro	loader	54.39 kB / 19.23 kB (gzip)	54.39 kB / 19.23 kB (gzip)	0% / 0.01% (gzip)
pro	async-chunk	92.49 kB / 29 kB (gzip)	92.66 kB / 29.06 kB (gzip)	0.18% / 0.2% (gzip)
spa	loader	63.24 kB / 21.92 kB (gzip)	63.24 kB / 21.93 kB (gzip)	0% / 0.01% (gzip)
spa	async-chunk	117.9 kB / 36.32 kB (gzip)	118.07 kB / 36.35 kB (gzip)	0.14% / 0.07% (gzip)

[codecov]

Codecov Report

❌ Patch coverage is 42.85714% with 16 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.36%. Comparing base (41d9d3b) to head (68c3206).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
src/features/page_view_event/aggregate/index.js	33.33%	11 Missing and 1 partial ⚠️
src/common/harvest/harvester.js	60.00%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1605      +/-   ##
==========================================
- Coverage   88.51%   88.36%   -0.15%     
==========================================
  Files         206      206              
  Lines        7760     7772      +12     
  Branches     1591     1589       -2     
==========================================
- Hits         6869     6868       -1     
- Misses        779      791      +12     
- Partials      112      113       +1     

Flag	Coverage Δ
unit-tests	81.68% <42.85%> (-0.10%)	⬇️

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[github-actions]

Last ran on November 05, 2025 10:09:58 CST
Checking merge of (159f2ae) into main (41d9d3b)