feat: Reduce hasReplay attribute false positive rate

[metal-messiah]

Only set "hasReplay" attribute once a successful session replay harvest has been observed to help reduce false positives.

Overview

Related Issue(s)

https://new-relic.atlassian.net/browse/NR-475215

Testing

[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.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.16%. Comparing base (d38e8b9) to head (88ab2b8).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1586   +/-   ##
=======================================
  Coverage   88.16%   88.16%           
=======================================
  Files         205      205           
  Lines        7856     7857    +1     
  Branches     1607     1607           
=======================================
+ Hits         6926     6927    +1     
  Misses        806      806           
  Partials      124      124           

Flag	Coverage Δ
unit-tests	81.02% <100.00%> (+<0.01%)	⬆️

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[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	26.08 kB / 9.85 kB (gzip)	26.08 kB / 9.85 kB (gzip)	0% / 0.05% (gzip)
lite	async-chunk	55.82 kB / 18.4 kB (gzip)	55.87 kB / 18.42 kB (gzip)	0.08% / 0.08% (gzip)
pro	loader	54.82 kB / 19.28 kB (gzip)	54.82 kB / 19.28 kB (gzip)	0% / -0.02% (gzip)
pro	async-chunk	94.82 kB / 29.5 kB (gzip)	94.87 kB / 29.51 kB (gzip)	0.05% / 0.04% (gzip)
spa	loader	63.67 kB / 21.99 kB (gzip)	63.67 kB / 21.99 kB (gzip)	0% / 0% (gzip)
spa	async-chunk	120.47 kB / 36.78 kB (gzip)	120.51 kB / 36.79 kB (gzip)	0.04% / 0.04% (gzip)

[github-actions]

Last ran on October 09, 2025 11:42:37 CDT
Checking merge of (88ab2b8) into main (d38e8b9)