Add InferenceService lifecycle state

[kartikkhurana1898]

Summary

Adds a high-level status.lifecycleState field to InferenceService.

The field is derived from existing Kubernetes/OME status signals:

• deletion timestamp
• Ready condition
• status.modelStatus.transitionStatus
• status.modelStatus.lastFailureInfo
• component rollout revisions
• previous lifecycleState

Motivation

InferenceService already exposes detailed conditions and model transition state, but integrations often need a simple lifecycle summary without reimplementing the condition/status interpretation logic. This adds that summary while keeping the source of truth in existing OME status fields.

State Mapping

• deleting object -> DELETING
• hard failure (InvalidSpec, BlockedByFailedLoad, or lastFailureInfo) -> FAILED
• ready service -> READY
• progress during initial reconciliation -> CREATING
• progress after an established state -> UPDATING
• previously established service with Ready=False and no progress -> FAILED
• fallback -> CREATING

Testing

• go test ./pkg/controller/v1beta1/inferenceservice/status ./pkg/apis/ome/v1beta1
• go test ./pkg/controller/v1beta1/inferenceservice -run '^$'
• make manifests
• make generate