fix: Session Replay text masking for whitespace

[ptang-nr]

There is an edge case where whitespace was being masked, which interferes with the layout/styling in session replays.

Overview

In this PR, we address the edge case by allowing the whitespace to return as-is when it's not a password field.

Related Issue(s)

https://new-relic.atlassian.net/browse/NR-379491

Testing

Added unit test for customMasker function
Manually tested session replay on customer's site using rrweb REPL

[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	30.54 kB / 11.06 kB (gzip)	30.54 kB / 11.06 kB (gzip)	0% / 0% (gzip)
lite	async-chunk	52.72 kB / 17.21 kB (gzip)	52.72 kB / 17.21 kB (gzip)	0% / 0% (gzip)
pro	loader	52.63 kB / 18.13 kB (gzip)	52.92 kB / 18.24 kB (gzip)	0.55% / 0.63% (gzip)
pro	async-chunk	101.18 kB / 30.86 kB (gzip)	101.18 kB / 30.86 kB (gzip)	0% / 0% (gzip)
spa	loader	60.24 kB / 20.45 kB (gzip)	60.53 kB / 20.57 kB (gzip)	0.48% / 0.58% (gzip)
spa	async-chunk	115.89 kB / 35.21 kB (gzip)	115.89 kB / 35.21 kB (gzip)	0% / 0% (gzip)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.73%. Comparing base (1832562) to head (3fe1720).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1416      +/-   ##
==========================================
- Coverage   88.73%   88.73%   -0.01%     
==========================================
  Files         170      170              
  Lines        7442     7446       +4     
  Branches     1509     1511       +2     
==========================================
+ Hits         6604     6607       +3     
- Misses        730      731       +1     
  Partials      108      108              

Flag	Coverage Δ
integration-tests	90.86% <100.00%> (-0.04%)	⬇️
unit-tests	80.04% <100.00%> (+<0.01%)	⬆️

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[github-actions]

Last ran on March 17, 2025 11:54:36 CDT
Checking merge of (3fe1720) into main (1832562)