chore: update embedded cluster to 2.8.1 with domain configuration

[adamancini]

Summary

• Update Embedded Cluster version from 2.7.2 to 2.8.1 while maintaining k8s-1.31
• Configure EC domains for proxy registry and replicated app

Changes

• Update EC version to 2.8.1+k8s-1.31 in replicated/cluster.yaml
• Maintain existing domain configuration:
  • proxyRegistryDomain: proxy.xdrcft.net
  • replicatedAppDomain: app.xdrcft.net

Testing

• Verify EC installation with new version
• Confirm domain configuration works as expected
• Test proxy registry connectivity

[Copilot]

Pull Request Overview

Updates the Embedded Cluster configuration to version 2.8.1 with Kubernetes 1.31 and adds domain configuration for proxy registry and replicated app domains.

• Upgrade Embedded Cluster from version 2.1.3+k8s-1.29 to 2.8.1+k8s-1.31
• Add domain configuration with proxy registry and replicated app domains
• Include YAML language server schema reference for better IDE support

[Copilot]

The version update shows a jump from 2.1.3+k8s-1.29 to 2.8.1+k8s-1.31 in the diff, but the PR description mentions updating from 2.7.2. This inconsistency suggests either the diff baseline is incorrect or the PR description is inaccurate.

Suggested change

	version: 2.8.1+k8s-1.31
	version: 2.7.2

[0xJMart]

Looks good!

[adamancini]

Changes look OK but in my testing I'm still seeing that my images are not sourced from the registry proxy

[adamancini]

Events:
  Type    Reason     Age   From               Message
  ----    ------     ----  ----               -------
  Normal  Scheduled  29s   default-scheduler  Successfully assigned wg-easy/wg-easy-676cb84ff4-lwv95 to ada-ec.c.replicated-qa.internal
  Normal  Pulling    28s   kubelet            Pulling image "ghcr.io/wg-easy/wg-easy:14"
  Normal  Pulled     23s   kubelet            Successfully pulled image "ghcr.io/wg-easy/wg-easy:14" in 5.367s (5.367s including waiting). Image size: 61055228 bytes.