feat: implement rollback for deployments

[vantoan1511]

Summary

Adds a deployment rollback feature in Orbit, allowing users to revert any Kubernetes Deployment to its previous revision directly from the context menu in the UI.

Changes

• Backend (Rust Engine):
  • Added find_rollback_replicaset to identify the previous revision from owned ReplicaSets based on deployment.kubernetes.io/revision annotations.
  • Added clean_template_for_rollback to sanitize the pod template spec by stripping ephemeral hash labels (pod-template-hash).
  • Added rollback_deployment to patch the Deployment spec template with the target ReplicaSet's template.
  • Added IPC handler rollback_deployment and wired the rollbackDeployment event in the dispatch router.
• Frontend (Vue/TypeScript):
  • Added rollbackDeployment API wrapper in kubernetesService.ts.
  • Added 'Rollback' action with confirmation prompt in useWorkloadActions.ts.
• Tests:
  • Added unit tests in core/engine/src/kubernetes/workloads.rs for find_rollback_replicaset and clean_template_for_rollback.

Files Changed

File	Change
core/engine/src/kubernetes/workloads.rs	Modified
core/engine/src/ipc/handlers/workloads.rs	Modified
core/engine/src/ipc/handlers/mod.rs	Modified
src/services/kubernetesService.ts	Modified
src/composables/useWorkloadActions.ts	Modified

Testing

• Automated: Ran all 22 Rust unit tests (cargo test --package orbit-engine) passing.
• Static Analysis: Ran vue-tsc --build and cargo check with 0 errors.
• Lint: Passed eslint . --fix --max-warnings 0.
• Build: Verified npm run build succeeds without issues.

Related Issues

None