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/types.ts

@@ -32,6 +32,8 @@ export interface ContainerConfig {
   timeout?: number; // Default: 300000 (5 minutes)
 }
 
+export type AgentType = 'claude-code' | 'codex';
+
 export interface RegisteredGroup {
   name: string;
   folder: string;
@@ -40,6 +42,7 @@ export interface RegisteredGroup {
   containerConfig?: ContainerConfig;
   requiresTrigger?: boolean; // Default: true for groups, false for solo chats
   isMain?: boolean; // True for the main control group (no trigger, elevated privileges)
+  agentType?: AgentType;
 }
 
 export interface NewMessage {