Migrate stateful workloads to the new source

[jorisjonkers-dev-agents]

Context. Move stateful data (PVCs, hostPath archives, Vault Raft snapshots) under the new managed flow. Restore primitives exist in homelab-deploy/scripts/restore/.

Depends on. Longhorn (#24) if moving onto Longhorn-backed storage.

Steps

• Inventory stateful workloads + their current storage.
• For each: snapshot/backup → move under new source/storage → restore → verify data.
• Do one workload at a time, lowest-risk first; keep backups until verified.

Acceptance

• All stateful workloads run from the new source with verified data and a tested restore path.