feat: add health checks for opendatahub.io DataScienceCluster and DSCInitialization (#26543)

[officialasishkumar]

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• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this does not need to be in the release notes.
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Summary

Adds built-in Lua health checks for two CRDs from the opendatahub.io API group:

• datasciencecluster.opendatahub.io/DataScienceCluster
• dscinitialization.opendatahub.io/DSCInitialization

These CRDs are used by OpenShift AI (Red Hat's managed ML platform) to manage platform lifecycle. Without native health checks, Argo CD reports these resources as Healthy even when they are still reconciling or in an error state.

Health Mapping

Both CRDs expose a .status.phase field. The mapping is:

.status.phase	Argo CD Health
Ready	Healthy
Error	Degraded
Any other phase or missing status	Progressing

When phase is Error, the errorMessage field from .status is used as the health message when available, giving operators immediate visibility into the failure reason.

Validation

• Health check tests pass for all five scenarios per CRD: healthy, progressing, not ready, degraded (error), and missing status.
• Phase values (Ready, Not Ready, Progressing, Error) verified against the opendatahub-operator source.

Closes #26543

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[Copilot]

Pull request overview

Adds built-in Lua health checks for two opendatahub.io CRDs so Argo CD reports more accurate health based on .status.phase (e.g., Progressing vs Degraded vs Healthy).

Changes:

• Add health.lua customizations for DataScienceCluster and DSCInitialization that map phase=Ready → Healthy, phase=Error → Degraded (with errorMessage), otherwise → Progressing.
• Add health-check test suites (health_test.yaml) for both kinds.
• Add representative test fixtures for ready, progressing, not-ready, degraded, and missing-status scenarios.

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
resource_customizations/dscinitialization.opendatahub.io/DSCInitialization/health.lua	Implements DSCInitialization health mapping from .status.phase (+ error message on Error).
resource_customizations/dscinitialization.opendatahub.io/DSCInitialization/health_test.yaml	Adds health check test cases for DSCInitialization.
resource_customizations/dscinitialization.opendatahub.io/DSCInitialization/testdata/healthy.yaml	Fixture: Ready/healthy DSCInitialization.
resource_customizations/dscinitialization.opendatahub.io/DSCInitialization/testdata/progressing.yaml	Fixture: Progressing DSCInitialization.
resource_customizations/dscinitialization.opendatahub.io/DSCInitialization/testdata/progressing_not_ready.yaml	Fixture: Not Ready DSCInitialization (expected Progressing).
resource_customizations/dscinitialization.opendatahub.io/DSCInitialization/testdata/degraded.yaml	Fixture: Error/degraded DSCInitialization (with errorMessage).
resource_customizations/dscinitialization.opendatahub.io/DSCInitialization/testdata/no_status.yaml	Fixture: Missing status DSCInitialization (expected Progressing).
resource_customizations/datasciencecluster.opendatahub.io/DataScienceCluster/health.lua	Implements DataScienceCluster health mapping from .status.phase (+ error message on Error).
resource_customizations/datasciencecluster.opendatahub.io/DataScienceCluster/health_test.yaml	Adds health check test cases for DataScienceCluster.
resource_customizations/datasciencecluster.opendatahub.io/DataScienceCluster/testdata/healthy.yaml	Fixture: Ready/healthy DataScienceCluster.
resource_customizations/datasciencecluster.opendatahub.io/DataScienceCluster/testdata/progressing.yaml	Fixture: Progressing DataScienceCluster.
resource_customizations/datasciencecluster.opendatahub.io/DataScienceCluster/testdata/progressing_not_ready.yaml	Fixture: Not Ready DataScienceCluster (expected Progressing).
resource_customizations/datasciencecluster.opendatahub.io/DataScienceCluster/testdata/degraded.yaml	Fixture: Error/degraded DataScienceCluster (with errorMessage).
resource_customizations/datasciencecluster.opendatahub.io/DataScienceCluster/testdata/no_status.yaml	Fixture: Missing status DataScienceCluster (expected Progressing).

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 63.35%. Comparing base (8c29202) to head (1a59f86).

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #27158      +/-   ##
==========================================
- Coverage   63.37%   63.35%   -0.02%     
==========================================
  Files         415      415              
  Lines       56555    56555              
==========================================
- Hits        35839    35830       -9     
- Misses      17338    17347       +9     
  Partials     3378     3378              

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