feat(controller): Reconcile ActionRun jobs

[amwarrier]

Summary

Add the ActionRun reconciler and the triage action catalog to Application.

An Application declares a shared triage runner (command, base args, env, resources, timeout) plus action objects containing name, description, and optional action-specific args. One ActionRun selects one catalog entry and creates one owned, one-shot Job.

The Job inherits the Application workload's service account and runtime context, uses the smaller action resource envelope, and receives the immutable selection through:

WANDB_ACTION_TYPE=triage
WANDB_ACTION_NAME=<selected-name>

The controller remains application-agnostic. It reads structured JSONL stdout, records flat phase/results/summary state on the ActionRun, and uses standard Kubernetes status conditions. maintenance is accepted by the API but fails with UnsupportedActionType until its execution and safety semantics are implemented.

Validation

• go test ./internal/controller ./internal/controller/reconciler ./cmd/manager
• go vet ./internal/controller ./internal/controller/reconciler ./cmd/manager
• generated RBAC, CRDs, deep-copy code, and embedded CRDs are synchronized

Stack

• Depends on: feat(api): Define ActionRun CRD #304
• This PR: Application triage catalog, ActionRun controller, and Job execution

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