Improvemen: `ReconcileWorkerSliceConfig` does not emit a Kubernetes Event when `UpdateResource` fails

[mdryaan]

Problem:
At lines 282–286 of ReconcileWorkerSliceConfig, an UpdateResource failure silently returns an error with no Kubernetes Event recorded. At lines 398–411 in the same file, CreateMinimalWorkerSliceConfig records EventWorkerSliceConfigUpdateFailed on the equivalent failure. The event recorder is initialized at lines 71–74 and is in scope throughout ReconcileWorkerSliceConfig. The inconsistency means operators monitoring Events will miss reconciliation failures on update.

Proposed Solution:
Before returning the error at line 284, add:

util.RecordEvent(ctx, eventRecorder, workerSliceConfig, nil, events.EventWorkerSliceConfigUpdateFailed)

Type of Issue: improvement / observability

✅ Expected Behavior

A Kubernetes Event with reason EventWorkerSliceConfigUpdateFailed is recorded whenever ReconcileWorkerSliceConfig fails to update the worker slice config resource.

👎 Actual Behavior

No event is emitted. The failure is invisible in kubectl get events.

✅ Proposed Solution

Add util.RecordEvent(ctx, eventRecorder, workerSliceConfig, nil, events.EventWorkerSliceConfigUpdateFailed) before the return ctrl.Result{}, err at worker_slice_config_service.go line 284.

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