feat: telegram bot (grammy webhook) — full parity channel

- pairing (admin code -> chat link), bundling of forwarded images via drafts+quiet-window sweeper
- recipe pick via inline keyboard, job (origin=telegram) creation, one summary reply with result files + links
- compressed-photo detection/flag; /start /help /rezepte /status
- webhook route (secret token), admin pairing-code + links endpoints, AdminApp telegram section
- worker notifies chat on completion; migration 002 adds jobs.telegram_chat_id; setupTelegram on init

src/pages/api/admin/telegram/links.ts

@@ -0,0 +1,19 @@
+import type { APIRoute } from 'astro';
+import { query } from '../../../../lib/db';
+
+export const prerender = false;
+const json = (b: unknown, s = 200) =>
+  new Response(JSON.stringify(b), { status: s, headers: { 'Content-Type': 'application/json' } });
+
+export const GET: APIRoute = async () => {
+  const links = await query(`SELECT l.chat_id, l.active, l.linked_at, u.display_name AS user_name
+    FROM telegram_links l LEFT JOIN users u ON u.id=l.user_id ORDER BY l.linked_at DESC`);
+  return json({ links });
+};
+
+export const DELETE: APIRoute = async ({ request }) => {
+  const b = await request.json().catch(() => ({}));
+  if (!b.chat_id) return json({ error: 'chat_id nötig.' }, 400);
+  await query('DELETE FROM telegram_links WHERE chat_id=$1', [b.chat_id]);
+  return json({ ok: true });
+};