Improve coverage quick wins

[tbavelier]

What does this PR do?

Adds focused unit tests for low-risk helper packages and excludes non-product/generated paths from uploaded coverage.

Motivation

Improve useful coverage while avoiding noise from CRD schema files, generated manifests, docs, examples, and release tooling.

Additional Notes

No production code changes.

Minimum Agent Versions

• Agent: N/A
• Cluster Agent: N/A

Describe your test plan

go test ./pkg/controller/utils/comparison ./pkg/cilium/v1 ./cmd/yaml-mapper/utils ./pkg/condition -cover -timeout 90s

Checklist

• PR has at least one valid label: bug, enhancement, refactoring, documentation, tooling, and/or dependencies
• PR has a milestone or the qa/skip-qa label
• All commits are signed (see: signing commits)

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 47.72%. Comparing base (20ecb9e) to head (f09c127).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3020      +/-   ##
==========================================
+ Coverage   41.50%   47.72%   +6.22%     
==========================================
  Files         335      331       -4     
  Lines       28714    28322     -392     
==========================================
+ Hits        11919    13518    +1599     
+ Misses      16001    13976    -2025     
- Partials      794      828      +34     

Flag	Coverage Δ
unittests	47.72% <ø> (+6.22%)	⬆️

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see 25 files with indirect coverage changes

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[datadog-datadog-prod-us1]

🎯 Code Coverage (details)
• Patch Coverage: 100.00%
• Overall Coverage: 48.29% (+6.47%)

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: f09c127 | Docs | Datadog PR Page | Give us feedback!}

[chatgpt-codex-connector]

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Reviewed commit: f09c127386

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[chatgpt-codex-connector]

Narrow the API types ignore

When hand-written helpers live in API type files, this new ignore removes real product logic from the coverage gates, not just schema declarations. For example, api/datadoghq/v1alpha1/datadogslo_types.go contains the executable DatadogSLOType.IsValid() helper, and the same broad api/datadoghq/**/*_types.go pattern was also added to the Datadog coverage config, so changes in these helpers can be reported as fully covered/ignored by both systems. Consider excluding only generated schema files or moving such helpers out of ignored files.

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