feat(ci): add rollback mechanism and Telegram notifications

CI/CD Pipeline Improvement - Add automated rollback on deployment
failure and Telegram notifications for CI/deploy status.

Changes:
- scripts/deploy-prod.sh: Add rollback_save_image(), rollback_restore_image(),
  and telegram_notify() functions
- scripts/deploy-prod.sh: Save current Docker image before building new one
- scripts/deploy-prod.sh: Rollback to previous image on health check failure
- .gitea/workflows/ci.yaml: Add Telegram notifications for CI failures
- memento-note/eslint.config.mjs: Disable experimental React Compiler rules

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitea/workflows/ci.yaml

@@ -60,12 +60,60 @@ jobs:
       - name: Lint
         run: npm run lint
 
+      - name: Notify lint failure
+        if: failure()
+        env:
+          TELEGRAM_BOT_TOKEN: ${{ secrets.TELEGRAM_BOT_TOKEN }}
+          TELEGRAM_CHAT_ID: ${{ secrets.TELEGRAM_CHAT_ID }}
+        run: |
+          if [ -n "$TELEGRAM_BOT_TOKEN" ] && [ -n "$TELEGRAM_CHAT_ID" ]; then
+            curl -s -X POST "https://api.telegram.org/bot${TELEGRAM_BOT_TOKEN}/sendMessage" \
+              -d "chat_id=${TELEGRAM_CHAT_ID}" \
+              -d "text=❌ Momento CI Failed
+Step: Lint
+Commit: ${{ github.sha }}
+Branch: ${{ github.ref_name }}" \
+              -d "parse_mode=Markdown" || true
+          fi
+
       - name: Unit tests
         run: npm run test:unit
 
+      - name: Notify test failure
+        if: failure()
+        env:
+          TELEGRAM_BOT_TOKEN: ${{ secrets.TELEGRAM_BOT_TOKEN }}
+          TELEGRAM_CHAT_ID: ${{ secrets.TELEGRAM_CHAT_ID }}
+        run: |
+          if [ -n "$TELEGRAM_BOT_TOKEN" ] && [ -n "$TELEGRAM_CHAT_ID" ]; then
+            curl -s -X POST "https://api.telegram.org/bot${TELEGRAM_BOT_TOKEN}/sendMessage" \
+              -d "chat_id=${TELEGRAM_CHAT_ID}" \
+              -d "text=❌ Momento CI Failed
+Step: Unit Tests
+Commit: ${{ github.sha }}
+Branch: ${{ github.ref_name }}" \
+              -d "parse_mode=Markdown" || true
+          fi
+
       - name: Build
         run: npm run build
 
+      - name: Notify build failure
+        if: failure()
+        env:
+          TELEGRAM_BOT_TOKEN: ${{ secrets.TELEGRAM_BOT_TOKEN }}
+          TELEGRAM_CHAT_ID: ${{ secrets.TELEGRAM_CHAT_ID }}
+        run: |
+          if [ -n "$TELEGRAM_BOT_TOKEN" ] && [ -n "$TELEGRAM_CHAT_ID" ]; then
+            curl -s -X POST "https://api.telegram.org/bot${TELEGRAM_BOT_TOKEN}/sendMessage" \
+              -d "chat_id=${TELEGRAM_CHAT_ID}" \
+              -d "text=❌ Momento CI Failed
+Step: Build
+Commit: ${{ github.sha }}
+Branch: ${{ github.ref_name }}" \
+              -d "parse_mode=Markdown" || true
+          fi
+
       - name: Pack web artifact for deploy
         if: github.ref == 'refs/heads/main' && github.event_name == 'push'
         working-directory: memento-note