NH-143290 Update debug logging for Lambda

[tammy-baylis-swi]

Updates APM Python debug logging to be less duplicative, and to be more clear/useful while in Lambda environment.

Changes:

• Cache and reuse Lambda-environment detection in SolarWindsDistro (self._is_lambda), and suppress specific debug logs when running in Lambda mode.
• Update SolarWindsApmConfig.__str__() to exclude service_key and collector in Lambda mode, while preserving masked service_key behavior outside Lambda; adds is_lambda to the output in both scenarios. This is logged at the end of ApmConfig init.
• Reduce repeated debug noise by logging “no default config file” only once; add/expand unit tests around these behaviors.

Also:

• Undo a change made by copilot in 3c8b6ec which was making Lambda test publish fail

See ticket for additional testing.

[Copilot]

Pull request overview

This PR refines debug logging behavior for AWS Lambda deployments and adjusts configuration/log output to avoid emitting sensitive or irrelevant fields in Lambda contexts within the SolarWinds APM OpenTelemetry distribution.

Changes:

• Cache and reuse Lambda-environment detection in SolarWindsDistro, and suppress specific debug logs when running in Lambda mode.
• Update SolarWindsApmConfig.__str__() to exclude service_key and collector in Lambda mode, while preserving masked service_key behavior outside Lambda; add is_lambda to the output.
• Reduce repeated debug noise by logging “no default config file” only once; add/expand unit tests around these behaviors.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
solarwinds_apm/distro.py	Adds cached is_lambda evaluation and gates certain debug logs in Lambda mode.
solarwinds_apm/apm_config.py	Adds Lambda-specific config rendering for __str__() and deduplicates missing-config-file debug logs.
solarwinds_apm/oboe/json_sampler.py	Makes JSON sampler debug logs more actionable by referencing the otelcol extension.
tests/unit/test_distro.py	Adds tests verifying missing service key logging differs between Lambda vs non-Lambda.
tests/unit/test_apm_config/test_apm_config.py	Adds tests for Lambda/non-Lambda __str__() output and _config_lambda() behavior.
tests/unit/test_apm_config/test_apm_config_cnf_file.py	Adds tests ensuring the “no config file” debug message is emitted only once.

[raphael-theriault-swi]

Fourth digit means not a stable version if I understand correctly ? Just making sure it's not a typo but I think I remember seeing it a bunch in your release PRs

[tammy-baylis-swi]

Yes that's correct 👍

I actually didn't mean to commit this but testrelease is next anyway so it'll work.

[jerrytfleung]

LGTM