feat: implement Telegram bot for Claude status webhooks

Cloudflare Workers bot that forwards status.claude.com (Atlassian
Statuspage) incident and component updates to subscribed Telegram
users via CF Queues fan-out.

- Hono.js routing with grammY webhook handler
- Bot commands: /start, /stop, /status, /subscribe
- Supergroup topic support (message_thread_id)
- KV store with claude-status: prefix and composite keys
- Queue consumer with batch send, 403 auto-removal, 429 retry
- Timing-safe webhook secret validation
- HTML escaping for Telegram messages

src/index.js

@@ -0,0 +1,15 @@
+import { Hono } from "hono";
+import { handleTelegramWebhook } from "./bot-commands.js";
+import { handleStatuspageWebhook } from "./statuspage-webhook.js";
+import { handleQueue } from "./queue-consumer.js";
+
+const app = new Hono();
+
+app.get("/", (c) => c.text("Claude Status Bot is running"));
+app.post("/webhook/telegram", (c) => handleTelegramWebhook(c));
+app.post("/webhook/status/:secret", (c) => handleStatuspageWebhook(c));
+
+export default {
+  fetch: app.fetch,
+  queue: handleQueue,
+};