feat(workflow): Database Migration for Redis Cloud

[joshrotenberg]

Overview

Implement a workflow that automates database migration between subscriptions or regions in Redis Cloud.

Workflow Steps

1. Validate source database accessibility
2. Create backup of source database
3. Create target subscription (if needed)
4. Configure networking on target
5. Create target database with matching specs
6. Restore backup to target database
7. Verify data integrity
8. Optional: Set up replication for zero-downtime cutover
9. Provide migration report

Example Usage

redisctl cloud workflow migrate-database \
  --source-subscription 12345 \
  --source-database 67890 \
  --target-region eu-west-1 \
  --verify-data \
  --enable-replication \
  --cutover-at "2024-01-15 02:00 UTC" \
  --output json

Value Proposition

• Automated migration reduces risk
• Handles backup/restore complexity
• Optional zero-downtime with replication
• Data integrity verification
• Detailed migration reporting

Acceptance Criteria

• Backup source database
• Create/configure target environment
• Handle different subscription types
• Restore with verification
• Optional replication setup
• Cutover scheduling
• Rollback capability
• Progress tracking
• Migration report generation
• Documentation and examples

Related to #260 (workflow system implementation)

[joshrotenberg]

Part of epic #3 (Roadmap: High-Level Workflow Commands)