fix: Prevent agent using invalid date header

[patrickhousley]

Shut down the agent when unable to read a correctly formatted date header for the page view event harvest. This prevents harvesting data with wildly inaccurate timestamps. This should only happen with third-party or non-agent code has tampered with the ajax response headers.

Overview

Adding supportability metrics to track when the calculated time diff is >= 12 hours, >= 6 hours, or >= 1 hour.

Related Issue(s)

https://new-relic.atlassian.net/browse/NR-295258
https://source.datanerd.us/agents/angler/pull/600

Testing

[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	32.44 kB / 11.33 kB (gzip)	32.44 kB / 11.33 kB (gzip)	0% / 0% (gzip)
lite	async-chunk	50.14 kB / 16.15 kB (gzip)	50.9 kB / 16.39 kB (gzip)	1.5% / 1.45% (gzip)
pro	loader	53.3 kB / 18.04 kB (gzip)	53.3 kB / 18.04 kB (gzip)	0% / 0.01% (gzip)
pro	async-chunk	96.37 kB / 28.8 kB (gzip)	97.12 kB / 29.04 kB (gzip)	0.78% / 0.83% (gzip)
spa	loader	61.24 kB / 20.48 kB (gzip)	61.24 kB / 20.48 kB (gzip)	0% / 0.01% (gzip)
spa	async-chunk	111.42 kB / 33.14 kB (gzip)	112.18 kB / 33.37 kB (gzip)	0.68% / 0.7% (gzip)
lite-polyfills	loader	125.99 kB / 40.61 kB (gzip)	125.99 kB / 40.62 kB (gzip)	0% / 0.02% (gzip)
lite-polyfills	async-chunk	64.2 kB / 18.49 kB (gzip)	64.99 kB / 18.73 kB (gzip)	1.23% / 1.3% (gzip)
pro-polyfills	loader	148.55 kB / 46.95 kB (gzip)	148.55 kB / 46.95 kB (gzip)	0% / 0% (gzip)
pro-polyfills	async-chunk	116.53 kB / 31.11 kB (gzip)	117.32 kB / 31.32 kB (gzip)	0.68% / 0.69% (gzip)
spa-polyfills	loader	156.75 kB / 49.11 kB (gzip)	156.75 kB / 49.11 kB (gzip)	0% / 0% (gzip)
spa-polyfills	async-chunk	133.44 kB / 35.78 kB (gzip)	134.23 kB / 35.99 kB (gzip)	0.59% / 0.59% (gzip)

[github-actions]

Last ran on July 24, 2024 11:17:29 CDT
Checking merge of (8c6db74) into main (c22a39d)

[codecov]

Codecov Report

Attention: Patch coverage is 29.41176% with 12 lines in your changes missing coverage. Please review.

Project coverage is 87.70%. Comparing base (c22a39d) to head (bb76965).

Files	Patch %	Lines
src/features/page_view_event/aggregate/index.js	0.00%	6 Missing and 4 partials ⚠️
src/common/timing/time-keeper.js	71.42%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1122      +/-   ##
==========================================
- Coverage   87.83%   87.70%   -0.13%     
==========================================
  Files         162      162              
  Lines        7267     7282      +15     
  Branches     1428     1435       +7     
==========================================
+ Hits         6383     6387       +4     
- Misses        766      773       +7     
- Partials      118      122       +4     

Flag	Coverage Δ
unit-tests	76.21% <29.41%> (-0.17%)	⬇️

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