[Core] Keep Alfred execution fail closed

[pallasathena92]

Summary

• Keep every Arbiter-admitted recommendation withheld until a future
  Dispatcher and its admission guard confirm submission.
• Report the current boundary truthfully: RecommendOnly in recommend-only
  mode and DispatcherUnavailable in execute mode.
• Remove current InferenceService write permission.
• Pre-create Alfred's spec-less leader-election Lease and restrict its Role to
  named get/update access.
• Update OEP-0008's implementation, Dispatcher, RBAC, and leader-election
  sections, plus Alfred manifests/tests, to distinguish current behavior from
  the deferred target design.

Scope

This PR is stacked on #823 and is intentionally Alfred-only.

It does not change the OME manager, InferenceReplica controller, workload
package, or migration packages. It does not ship a capability producer or
reader, a Dispatcher, migration writes, or InferenceService patch RBAC.
The capability Lease producer, Alfred Lease reader, and just-in-time
pre-dispatch check remain deferred.

Verification

go test ./pkg/alfred/... ./cmd/alfred/... -count=1
go vet ./pkg/alfred/... ./cmd/alfred/...
kubectl kustomize config/alfred
pre-commit run --all-files --show-diff-on-failure

Summary by CodeRabbit

• Behavior Changes

  • Recommendations are now consistently reported as withheld until dispatch and admission safeguards are available.
  • Withholding details now distinguish recommend-only operation from unavailable dispatch capability.
  • Non-movable workloads and opt-outs continue to produce advisory recommendations without triggering execution.

• Security

  • Alfred’s permissions are restricted to read-only cluster observation and updates to its designated leadership lease.
  • InferenceService modification permissions have been removed.

• Documentation

  • Updated deployment, configuration, and implementation guidance to reflect the current observation-only behavior.

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📥 Commits

Reviewing files that changed from the base of the PR and between fc5cb7d and 65a8ea5.

📒 Files selected for processing (11)

• cmd/alfred/main.go
• cmd/alfred/manifests_test.go
• config/alfred/clusterrole.yaml
• config/alfred/configmap.yaml
• config/alfred/deployment.yaml
• config/alfred/kustomization.yaml
• config/alfred/lease.yaml
• config/alfred/role.yaml
• oeps/0008-alfred-gpu-cluster-caretaker/README.md
• pkg/alfred/engine/reporter.go
• pkg/alfred/engine/reporter_test.go

🚧 Files skipped from review as they are similar to previous changes (7)

• config/alfred/deployment.yaml
• config/alfred/kustomization.yaml
• config/alfred/role.yaml
• config/alfred/clusterrole.yaml
• config/alfred/lease.yaml
• pkg/alfred/engine/reporter_test.go
• cmd/alfred/manifests_test.go

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📝 Walkthrough

Walkthrough

Alfred now withholds admitted candidates in both modes until Dispatcher support exists. Its manifests use a pre-created, name-scoped leader-election Lease and read-only cluster access. Contract tests validate rendered resources and RBAC. The OEP records dense status validation and deferred execution capabilities.

Changes

Alfred observation and authorization contracts

Layer / File(s)	Summary
Withheld recommendation reporting cmd/alfred/main.go, config/alfred/configmap.yaml, pkg/alfred/engine/reporter.go, pkg/alfred/engine/reporter_test.go	Both modes report admitted candidates as withheld. Persisted records include mode-specific reasons, and events use RecommendationWithheld.
Manifest and RBAC authorization cmd/alfred/manifests_test.go, config/alfred/clusterrole.yaml, config/alfred/kustomization.yaml, config/alfred/lease.yaml, config/alfred/role.yaml, oeps/0008-alfred-gpu-cluster-caretaker/README.md	The deployment manages a pre-created Lease and restricts Lease access to named get and update. Manifest tests validate namespace, bindings, permissions, and read-only InferenceService access.
Status validation and policy baseline oeps/0008-alfred-gpu-cluster-caretaker/README.md	The OEP defines direct dense InstanceStatuses validation, advisory behavior for unsupported or opted-out workloads, and deferred Dispatcher and capability-Lease work.

Estimated code review effort: 3 (Moderate) | ~25 minutes

Merge Risk: ⚪ Minimal · up to 65a8e

Alfred now reports admitted candidates as withheld in both modes and narrows its permissions to observation and leader election. No current merge-blocking risk remains.

Sequence Diagram(s)

sequenceDiagram
  participant AlfredDecisionLoop
  participant RecommendationReporter
  participant RecommendationRecord
  participant KubernetesEvent
  AlfredDecisionLoop->>RecommendationReporter: submit admitted candidate
  RecommendationReporter->>RecommendationRecord: persist withheld outcome and reason
  RecommendationReporter->>KubernetesEvent: emit RecommendationWithheld event

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🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 8.86% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 79 functions across 23 files. (7 skipped: …	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main change: Alfred execution remains fail closed until Dispatcher and admission guard support is available.

Full details: Docstring Coverage

Explanation

Docstring coverage is 8.86% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 79 functions across 23 files. (7 skipped: 7 unsupported.)

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Actionable comments posted: 2

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Inline comments:
In `@cmd/manager/main.go`:
- Around line 585-586: Update Alfred’s rendered configuration so
omenativeCapabilityLeaseNamespace uses the deployed manager namespace rather
than a hardcoded ome value, matching constants.OMENamespace used by
NewCapabilityPublisher. Parameterize the related Alfred manifests and
configuration together, and add a regression test covering a non-default
namespace such as ome-prod to verify OMENativeExecutorReader finds the published
capability Lease.

In `@pkg/controller/v1beta1/inferencereplica/capability.go`:
- Line 24: Enforce a minimum value for omenativeCapabilityMaxStaleness in the
relevant configuration validation, requiring enough headroom for multiple
capabilityPublishInterval periods rather than accepting any positive duration.
Preserve the existing 30s default and add a regression test covering values at
or below the unsafe threshold, while confirming valid larger values remain
accepted.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Team

Run ID: 4d8ab248-2407-485d-bb98-d294374521d1

📥 Commits

Reviewing files that changed from the base of the PR and between a7754b4 and e9118b5.

📒 Files selected for processing (32)

• charts/ome-resources/templates/ome-controller/deployment.yaml
• cmd/alfred/main.go
• cmd/alfred/main_test.go
• cmd/alfred/manifests_test.go
• cmd/manager/main.go
• cmd/manager/main_test.go
• config/alfred/clusterrole.yaml
• config/alfred/configmap.yaml
• config/alfred/deployment.yaml
• config/alfred/kustomization.yaml
• config/alfred/lease.yaml
• config/alfred/role.yaml
• config/manager/manager.yaml
• hack/alfred-e2e/README.md
• hack/alfred-e2e/nested/alfred-config.yaml
• hack/alfred-e2e/verify.sh
• oeps/0008-alfred-gpu-cluster-caretaker/README.md
• pkg/alfred/config/config.go
• pkg/alfred/config/config_test.go
• pkg/alfred/engine/reporter.go
• pkg/alfred/engine/reporter_test.go
• pkg/alfred/observer/loop.go
• pkg/alfred/observer/loop_test.go
• pkg/alfred/observer/omenative.go
• pkg/alfred/observer/omenative_test.go
• pkg/constants/constants.go
• pkg/controller/v1beta1/inferencereplica/capability.go
• pkg/controller/v1beta1/inferencereplica/capability_readiness.go
• pkg/controller/v1beta1/inferencereplica/capability_test.go
• pkg/controller/v1beta1/inferencereplica/manager.go
• pkg/controller/v1beta1/inferencereplica/manager_test.go
• pkg/controller/v1beta1/inferencereplica/reconciler.go

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