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`.

docker-compose.yml

@@ -63,6 +63,14 @@ services:
       FCM_ANDROID_CHANNEL_ID: "${FCM_ANDROID_CHANNEL_ID:-route_alerts}"
       FIREBASE_PROJECT_ID: "${FIREBASE_PROJECT_ID:-}"
       GOOGLE_APPLICATION_CREDENTIALS: "${GOOGLE_APPLICATION_CREDENTIALS:-/run/secrets/firebase-service-account.json}"
+      TELEGRAM_IMPORT_ENABLED: "${TELEGRAM_IMPORT_ENABLED:-false}"
+      TELEGRAM_AUTO_PUBLISH: "${TELEGRAM_AUTO_PUBLISH:-true}"
+      TELEGRAM_API_ID: "${TELEGRAM_API_ID:-}"
+      TELEGRAM_API_HASH: "${TELEGRAM_API_HASH:-}"
+      TELEGRAM_CHANNEL: "${TELEGRAM_CHANNEL:-avp2Polotsk}"
+      TELEGRAM_CITY_SLUG: "${TELEGRAM_CITY_SLUG:-polotsk}"
+      TELEGRAM_POLL_INTERVAL_MS: "${TELEGRAM_POLL_INTERVAL_MS:-60000}"
+      TELEGRAM_SESSION_FILE: "${TELEGRAM_SESSION_FILE:-/run/telegram-secrets/account.session}"
     ports:
       - "3000:3000"
     depends_on:
@@ -78,6 +86,10 @@ services:
       - avatars_data:/app/public/uploads/avatars
       - city_images_data:/app/public/uploads/cities
       - ${FIREBASE_SECRETS_DIR:-./secrets}:/run/secrets:ro
+      - type: bind
+        source: ${TELEGRAM_SECRETS_DIR:-./secrets}
+        target: /run/telegram-secrets
+        read_only: true
 
   frontend:
     build: