Add Railway deployment config and workflow

railway.toml with NIXPACKS build + /v1/health check.
deploy-railway.yml triggers on push to main and manual dispatch.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/deploy-railway.yml

@@ -0,0 +1,23 @@
+name: Deploy to Railway
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+jobs:
+  deploy:
+    name: Deploy to Railway
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Install Railway CLI
+        run: npm install -g @railway/cli
+
+      - name: Deploy to Railway
+        run: railway up --detach
+        env:
+          RAILWAY_TOKEN: ${{ secrets.RAILWAY_TOKEN }}
+          RAILWAY_PROJECT_ID: ${{ secrets.RAILWAY_PROJECT_ID }}

railway.toml

@@ -0,0 +1,10 @@
+[build]
+builder = "NIXPACKS"
+buildCommand = "npm ci && npm run build"
+
+[deploy]
+startCommand = "npm start"
+healthcheckPath = "/v1/health"
+healthcheckTimeout = 300
+restartPolicyType = "ON_FAILURE"
+restartPolicyMaxRetries = 10