Multi-Target Execution — run against N targets in parallel

[jacobhuemmer]

Summary

Run the same runbook against multiple targets simultaneously.

Design

• dops run infra.health-check --targets prod-us,prod-eu,prod-ap
• TUI splits into N output panes (or tabbed view)
• Web UI shows execution grid with per-target status
• Aggregated results: 3/3 passed, or 2/3 with diff on failure
• Target list from parameter, file, or command output
• Configurable concurrency limit

Impact

Eliminates running the same script N times manually. Essential for multi-cluster/multi-region operations.