ci: add Railway deployment workflow

Author: claude

.github/workflows/railway-deploy.yml

@@ -0,0 +1,25 @@
+name: Railway Deploy
+
+on:
+  push:
+    branches:
+      - main
+      - 'claude/**'
+  workflow_dispatch:
+
+jobs:
+  deploy:
+    name: Deploy to Railway
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Railway CLI
+        run: curl -fsSL https://railway.app/install.sh | sh
+
+      - name: Deploy to Railway
+        run: railway up --detach
+        env:
+          RAILWAY_TOKEN: ${{ secrets.RAILWAY_TOKEN }}