Migrate React UI to Svelte framework

Orchestrate gateway to Cinder system migration

Large-scale system migration with data integrity verification and rollback capability.

• · gateway config (source, target endpoints)
• · migration scope (data sets, time windows)
• · optional: parallelism config, batch size

• · migration plan (phases, data volumes per phase)
• · per-phase: data integrity verification, replication lag metrics
• · switchover checklist
• · post-switchover validation report

• · gateway CLI
• · Cinder system interface
• · data migration framework
• · verification agents

• · Gateway and Cinder systems running
• · Network connectivity between systems
• · Data backup available
• · Maintenance window scheduled (if required)

• · Data integrity check fails → phase paused, diff report generated
• · Replication lag exceeds threshold → slowdown mitigation or pause
• · Switchover validation fails → rollback to gateway, investigate
• · Post-switchover load causes degradation → scale up Cinder or failback

• · Data integrity verified per phase (hashes, row counts)
• · Replication lag metrics surface bottlenecks
• · Switchover gated by validation pass
• · Automated rollback if post-switchover fails