Refactor index (#156)

* feat: add Telegram channel with agent swarm support

Add Telegram as a messaging channel that can run alongside WhatsApp
or standalone (TELEGRAM_ONLY mode). Includes bot pool support for
agent swarms where each subagent appears as a different bot identity
in the group.

- Add grammy dependency for Telegram Bot API
- Route messages through tg: JID prefix convention
- Add storeMessageDirect for non-Baileys channels
- Add sender field to IPC send_message for swarm identity
- Support TELEGRAM_BOT_TOKEN, TELEGRAM_ONLY, TELEGRAM_BOT_POOL config

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* docs: add index.ts refactor plan

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* refactor: extract channel abstraction, IPC, and router from index.ts

Break the 1088-line monolith into focused modules:
- src/channels/whatsapp.ts: WhatsAppChannel class implementing Channel interface
- src/ipc.ts: IPC watcher and task processing with dependency injection
- src/router.ts: message formatting, outbound routing, channel lookup
- src/types.ts: Channel interface, OnInboundMessage, OnChatMetadata types

Also adds regression test suite (98 tests), updates all documentation
and skill files to reflect the new architecture.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* ci: add test workflow for PRs

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* chore: remove accidentally committed pool-bot assets

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix(ci): remove grammy from base dependencies

Grammy is installed by the /add-telegram skill, not a base dependency.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

container/agent-runner/src/ipc-mcp-stdio.ts

@@ -42,12 +42,16 @@ const server = new McpServer({
 server.tool(
   'send_message',
   "Send a message to the user or group immediately while you're still running. Use this for progress updates or to send multiple messages. You can call this multiple times. Note: when running as a scheduled task, your final output is NOT sent to the user — use this tool if you need to communicate with the user or group.",
-  { text: z.string().describe('The message text to send') },
+  {
+    text: z.string().describe('The message text to send'),
+    sender: z.string().optional().describe('Your role/identity name (e.g. "Researcher"). When set, messages appear from a dedicated bot in Telegram.'),
+  },
   async (args) => {
-    const data = {
+    const data: Record<string, string | undefined> = {
       type: 'message',
       chatJid,
       text: args.text,
+      sender: args.sender || undefined,
       groupFolder,
       timestamp: new Date().toISOString(),
     };