[INFRA] Cost Optimization - Use Spot Instances

[JoshuaAFerguson]

Use spot instances for session workloads (60-90% cost savings).

Implementation:

nodeSelector:
  node.kubernetes.io/instance-type: spot
tolerations:
  - key: spot
    operator: Equal
    value: "true"

Acceptance Criteria:

• Spot instance node pool created
• Session pods scheduled on spot
• Graceful handling of evictions
• Cost savings validated

Files: manifests/session-pod.yaml