fix: Force generic events feature to clear buffer when unloading

[metal-messiah]

Fixed an issue where the generic events buffer was not clearing when unloading. This affected a small portion of experiences where the agent was "unloading" due to the page losing focus, but not actually closing. Subsequent harvests when the page was re-focused would have the potential for duplicated data.

Overview

Related Issue(s)

NR-319565

Testing

Existing tests should continue to pass

[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	30.48 kB / 11.03 kB (gzip)	30.48 kB / 11.03 kB (gzip)	0% / 0% (gzip)
lite	async-chunk	51.57 kB / 16.73 kB (gzip)	51.57 kB / 16.73 kB (gzip)	0% / 0% (gzip)
pro	loader	51.48 kB / 17.79 kB (gzip)	51.48 kB / 17.78 kB (gzip)	0% / -0.02% (gzip)
pro	async-chunk	97.9 kB / 29.73 kB (gzip)	97.92 kB / 29.73 kB (gzip)	0.02% / 0% (gzip)
spa	loader	59.13 kB / 20.15 kB (gzip)	59.13 kB / 20.15 kB (gzip)	0% / 0% (gzip)
spa	async-chunk	112.96 kB / 34.08 kB (gzip)	112.98 kB / 34.08 kB (gzip)	0.02% / 0% (gzip)

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 88.42%. Comparing base (1b0bb1d) to head (acb9266).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/features/generic_events/aggregate/index.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1202      +/-   ##
==========================================
- Coverage   88.45%   88.42%   -0.03%     
==========================================
  Files         164      164              
  Lines        7221     7234      +13     
  Branches     1472     1478       +6     
==========================================
+ Hits         6387     6397      +10     
- Misses        710      713       +3     
  Partials      124      124              

Flag	Coverage Δ
unit-tests	78.68% <0.00%> (+<0.01%)	⬆️

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