refactor: replace WhatsApp with Telegram, rename container→jail, migrate skills to .agent/
- Replace WhatsApp channel (@whiskeysockets/baileys) with Telegram (grammy)
- Add src/channels/telegram.ts, remove src/channels/whatsapp.ts + whatsapp-auth.ts
- TELEGRAM_BOT_TOKEN required; fatal exit if not set
- Remove @whiskeysockets/baileys, qrcode, qrcode-terminal packages
- Update routing tests to use tg: JID format
- Rename container→jail throughout src/
- container-runner.ts → jail-runner.ts (jexec-based spawn)
- container-runtime.ts → jail-ops.ts (stopJail, ensureJailRunning, cleanupStaleJails)
- Add jail-config.ts, jail-runtime.ts for FreeBSD jail provisioning
- Rename config exports: CONTAINER_TIMEOUT→JAIL_TIMEOUT, MAX_CONCURRENT_CONTAINERS→MAX_CONCURRENT_JAILS
- Update group-queue.ts: isTaskContainer→isTaskJail, activeContainers→activeJails
- Migrate skills from .claude/skills/ to .agent/skills/
- Add tmux-screenshot skill (ANSI color PNG renderer, wide-char fix, 24-bit truecolor)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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