docs: Complete removal of deprecated Allocation API references

[github-actions]

Summary

This PR completes the documentation cleanup following PR #554, which removed the deprecated Allocation API types from the CRD reference documentation. This PR addresses remaining references found in the Go code and integration documentation.

Changes Made

API Type Documentation (api/v1alpha1/variantautoscaling_types.go)

• Updated VariantAutoscalingStatus godoc comment to remove mention of "current allocation"
• Now accurately reflects that the status only contains "desired optimized allocation and actuation status"

Integration Documentation

• HPA Integration (docs/integrations/hpa-integration.md): Added clarifying note about debug log examples
• KEDA Integration (docs/integrations/keda-integration.md): Added clarifying note about debug log examples

The debug log examples in both integration guides show internal optimizer data structures (like currentAlloc and desiredAlloc) from an older version that used model-based scaling. These are internal implementation details, not the public API types that were removed in PR #554. Added notes to clarify that current versions use saturation-based scaling with different internal representations.

Related Issues

• Follow-up to PR docs: Remove references to deprecated Allocation API types #554: "docs: Remove references to deprecated Allocation API types"
• Related to PR Removed allocation struct used in modelbased scaling #553: "removed allocation struct used in modelbased scaling"

Testing

• Documentation changes reviewed for accuracy
• No code changes requiring functional testing
• All references to removed API types properly documented

Documentation Quality

This PR follows the documentation standards outlined in the Update Docs workflow:

• ✅ Clear and accurate technical writing
• ✅ Maintains consistency with existing documentation style
• ✅ Provides context for historical examples
• ✅ Uses progressive disclosure (notes/warnings for important context)

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Note: This is an automated documentation update created by the Update Docs workflow.

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