Add Telegram cancellation import functionality with tests and documentation

- Implemented Telegram cancellation parsing logic in `telegramCancellationParser.js`.
- Created unit tests for cancellation parsing in `telegramCancellationParser.test.js`.
- Developed integration tests for Telegram import service in `telegramImport.integration.test.js`.
- Added API tests for Telegram import endpoints in `telegramImportApi.test.js`.
- Introduced service tests for Telegram import logic in `telegramImportService.test.js`.
- Documented the Telegram cancellation import process in `telegram-cancellation-import.md`.
- Built a React component for managing Telegram imports in `TelegramImportPanel.jsx`.

backend/package.json

@@ -9,6 +9,7 @@
     "test": "node --test",
     "migrate": "node src/utils/migrate.js",
     "create-admin": "node scripts/create-admin.js",
+    "telegram:login": "node scripts/telegram-login.js",
     "seed": "node src/utils/seed.js"
   },
   "keywords": [
@@ -35,6 +36,7 @@
     "pg": "^8.11.3",
     "redis": "^4.6.10",
     "socket.io": "^4.7.2",
+    "teleproto": "1.229.1",
     "uuid": "^9.0.1",
     "winston": "^3.11.0",
     "ws": "^8.20.0"