Use Kueue v1beta2 Workload API

[gjulianm]

What does this PR do?

Queries Kueue Workloads through v1beta2, with v1beta1 fallback for older clusters.

Motivation

Some Kueue clusters no longer serve the v1beta1 Workload endpoint.

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Add qa/required if this PR needs QA validation, or qa/skip-qa if it does not. Exactly one of the two is required.
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[datadog-prod-us1-4]

 

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 88.89%
• Overall Coverage: 82.82% (-5.47%)

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[datadog-prod-us1-4]

More details

Kueue workload collection now tries v1beta2 first with automatic fallback to v1beta1 on 404 errors, enabling support for clusters that no longer serve the deprecated v1beta1 endpoint. The fallback logic is sound—it only falls back on 404 (not found) and re-raises other errors immediately, ensuring no silent failures from permission or server errors. All test scenarios pass including both cluster-level and namespaced queries.

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Preserve priority-class tags when using v1beta2

When a cluster serves v1beta2, this new default returns v1beta2 Workload objects; for workloads with a priority class, that schema exposes the name at spec.priorityClassRef.name rather than the v1beta1 spec.priorityClassName (Kueue API docs). workload_event_tags still reads only spec.get('priorityClassName'), so lifecycle events collected through the new path silently lose the kueue_workload_priority_class tag while the fallback path keeps it. Please normalize the object or read both fields before preferring v1beta2.

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[dd-octo-sts]

Validation Report

All 21 validations passed.

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Validation	Description	Status
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metadata	Validate metadata.csv metric definitions	✅
models	Validate configuration data models match spec.yaml	✅
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package	Validate Python package metadata and naming	✅
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