#4288 feat(cli): scripted takeover hold and release subcommands

Summary

takeover today is a foreground interactive hold (TTL plus heartbeat), so scripted side-car tools — a dpctl harness, an adb side-car, a CI step — cannot announce themselves to the daemon and end up fighting live sessions for the same device. This adds non-interactive subcommands that reuse the existing human-control holds: takeover hold --device <udid> --reason <text> --ttl-ms 60000 prints a hold id, and takeover release <id> removes it. Same authority surface, one machine-readable entry.

11 files changed (CLI subcommands, hold plumbing, tests).

Validation

• Head: 2add31fa7 on a68693c72.
• pnpm run typecheck, pnpm run lint, takeover and CLI tests, integration-progress --check, fallow, freerange: pass locally.
• Independent cold review: APPROVE. CI runs the full gates on push.

🤖 Generated with Claude Code

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