stem95su: scheduled Drive->site sync CronJob (every 10m)

CronJob stem95su-gdrive-sync (*/10) mounts the content PVC RW and
rclone-syncs the read-only Drive folder "claude" (stem claude/files) onto
it (rclone/rclone:1.74.3, scope=drive.readonly, empty-source guard +
--max-delete 25). ESO ExternalSecret stem95su-rclone <- Vault
secret/stem95su. Requires the GCP OAuth app published to Production or the
refresh token expires ~weekly.

Lands the gdrive-sync stack on master (it had landed on a feature branch
by accident on the shared devvm checkout).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.claude/commands/kubectl.md

@@ -1,13 +0,0 @@
-# Kubectl Command
-
-Run kubectl commands on the cluster.
-
-```bash
-kubectl --kubeconfig $(pwd)/config $ARGUMENTS
-```
-
-Examples:
-- `/kubectl get pods -A` - List all pods
-- `/kubectl get pods -n immich` - List pods in immich namespace
-- `/kubectl logs -n immich deploy/immich-server` - View logs
-- `/kubectl describe pod -n monitoring <pod>` - Describe a pod