feat: Include APM Labels in forwarded application logs.

[jaffinito]

BEGIN_COMMIT_OVERRIDE
notice: New Relic APM language agents now allow you to opt-in to adding your custom tags (labels) to agent-forwarded logs. With custom tags on logs, platform engineers can easily filter, search, and correlate log data for faster and more efficient troubleshooting, improved performance, and optimized resource utilization. To learn more about this feature see the documentation. (#2831)

feat: New Relic APM language agents now allow you to opt-in to adding your custom tags (labels) to agent-forwarded logs. With custom tags on logs, platform engineers can easily filter, search, and correlate log data for faster and more efficient troubleshooting, improved performance, and optimized resource utilization. To learn more about this feature see the documentation. (#2831)
END_COMMIT_OVERRIDE

Description

Adds labels to in-agent forwarded logs.

• Disabled by default
• Labels are prefixed with "tags."
• Labels are added to common attributes, not individual logs.
• Allows individual labels to be excluded
• Includes unit and integration tests

Author Checklist

• Unit tests, Integration tests, and Unbounded tests completed
• Performance testing completed with satisfactory results (if required)

Reviewer Checklist

• Perform code review
• Pull request was adequately tested (new/existing tests, performance tests)

[tippmar-nr]

Nice work!

[nr-ahemsath]

LGTM 👍

[jaffinito]

Note: Holding off on merging this until we get some official feature/notice text since this is a cross-agent feature.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 97.50000% with 1 line in your changes missing coverage. Please review.

Project coverage is 81.43%. Comparing base (0278836) to head (8b8cb52).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...c/Agent/Core/Configuration/DefaultConfiguration.cs	93.33%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2831      +/-   ##
==========================================
+ Coverage   81.41%   81.43%   +0.01%     
==========================================
  Files         465      465              
  Lines       29535    29573      +38     
  Branches     3267     3275       +8     
==========================================
+ Hits        24047    24082      +35     
- Misses       4692     4693       +1     
- Partials      796      798       +2     

Flag	Coverage Δ
Agent	82.36% <97.50%> (+0.01%)	⬆️
Profiler	73.07% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...elic/Agent/Core/AgentHealth/AgentHealthReporter.cs	87.22% <100.00%> (+0.02%)	⬆️
...Relic/Agent/Core/Aggregators/LogEventAggregator.cs	94.84% <100.00%> (+0.10%)	⬆️
.../Agent/Core/Configuration/ReportedConfiguration.cs	95.79% <100.00%> (+0.03%)	⬆️
...erters/LogEventWireModelCollectionJsonConverter.cs	89.58% <100.00%> (+0.94%)	⬆️
.../Agent/NewRelic/Agent/Core/Labels/LabelsService.cs	90.47% <100.00%> (+0.82%)	⬆️
...c/Agent/NewRelic/Agent/Core/Metrics/MetricNames.cs	92.21% <100.00%> (+0.05%)	⬆️
...ent/Core/WireModels/LogEventWireModelCollection.cs	100.00% <100.00%> (ø)
...c/Agent/Core/Configuration/DefaultConfiguration.cs	89.65% <93.33%> (+0.03%)	⬆️

... and 2 files with indirect coverage changes