OpenShift: Migrate prod MinIO to HA distributed topology

[brijesh-amin]

Summary

Prod MinIO currently runs as a single-replica deployment backed by one RWO PVC. This limits availability and prevents horizontal scaling.

Scope

• Replace single-instance MinIO deployment with distributed MinIO (StatefulSet) using per-pod PVCs
• Keep a single stable service/route endpoint for clients
• Validate object PUT/GET behavior during and after cutover
• Plan and execute data migration from existing bucket data to distributed cluster
• Define rollback procedure

Acceptance Criteria

• MinIO runs with 4+ pods and per-pod storage
• Client endpoint remains stable
• Existing objects are accessible after migration
• Runbook documents cutover + rollback

Impact

Reduces downtime risk and removes single-pod storage bottleneck in prod.