feat: add Codex CLI support, dual Discord bots, and Discord typing fix

- Add Codex as alternative agent type (agentType: 'codex' per group)
- Codex container runner with session resume and 100-turn limit
- Dual Discord bot support (DISCORD_BOT_TOKEN + DISCORD_CODEX_BOT_TOKEN)
- Each bot handles only its agentType's registered groups
- Discord typing indicator refreshes every 8s (was single-shot, expired after ~10s)
- Agent runner 100-turn limit to prevent infinite bot-to-bot loops
- Apple Container runtime support (convert-to-apple-container skill)
- Session commands (/compact) support
- DB migration for agent_type column

src/config.ts

@@ -39,6 +39,8 @@ export const DATA_DIR = path.resolve(PROJECT_ROOT, 'data');
 
 export const CONTAINER_IMAGE =
   process.env.CONTAINER_IMAGE || 'nanoclaw-agent:latest';
+export const CODEX_CONTAINER_IMAGE =
+  process.env.CODEX_CONTAINER_IMAGE || 'nanoclaw-codex-agent:latest';
 export const CONTAINER_TIMEOUT = parseInt(
   process.env.CONTAINER_TIMEOUT || '1800000',
   10,