feat: add Railway bot service deployment workflow

- Add GHA workflow to build bot Docker image and push to GHCR
- Add railway.json config for bot service
- Triggers on changes to bot code, byte-common, or dependencies

Setup required:
1. Create "byte-bot" service in Railway dashboard
2. Set Root Directory to: services/bot
3. Add RAILWAY_BOT_SERVICE_ID secret to GitHub
4. Copy env vars from API service (DISCORD_TOKEN, etc.)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: JacobCoffee

.github/workflows/deploy-bot.yml

@@ -0,0 +1,95 @@
+name: Deploy Bot
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - 'services/bot/**'
+      - 'packages/byte-common/**'
+      - 'pyproject.toml'
+      - 'uv.lock'
+      - '.github/workflows/deploy-bot.yml'
+  workflow_dispatch:
+
+concurrency:
+  group: deploy-bot-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}-bot
+
+jobs:
+  build-and-push:
+    name: Build & Push
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    outputs:
+      image: ${{ steps.meta.outputs.tags }}
+      digest: ${{ steps.build.outputs.digest }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@b5ca514318bd6ebac0fb2aedd5d36ec1b5c232a2 # v3.10.0
+
+      - name: Log in to Container Registry
+        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3.4.0
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@902fa8ec7d6ecbf8d84d538b9b233a880e428804 # v5.7.0
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=sha,prefix=
+            type=raw,value=latest,enable={{is_default_branch}}
+
+      - name: Build and push
+        id: build
+        uses: docker/build-push-action@14487ce63c7a62a4a324b0bfb37086795e31c6c1 # v6.16.0
+        with:
+          context: .
+          file: services/bot/Dockerfile
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          platforms: linux/amd64
+
+  deploy:
+    name: Deploy to Railway
+    needs: build-and-push
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    environment:
+      name: production
+
+    steps:
+      - name: Deploy to Railway
+        env:
+          RAILWAY_TOKEN: ${{ secrets.RAILWAY_TOKEN }}
+        run: |
+          echo "Image: ghcr.io/${{ github.repository }}-bot:latest"
+          echo "Digest: ${{ needs.build-and-push.outputs.digest }}"
+
+          npm install -g @railway/cli
+
+          if [ -n "${{ secrets.RAILWAY_BOT_SERVICE_ID }}" ]; then
+            railway redeploy --service "${{ secrets.RAILWAY_BOT_SERVICE_ID }}" --yes
+          else
+            echo "::warning::RAILWAY_BOT_SERVICE_ID secret not set. Create a bot service in Railway and add the service ID."
+            exit 1
+          fi

services/bot/railway.json

@@ -0,0 +1,12 @@
+{
+  "$schema": "https://schema.up.railway.app/railway.schema.json",
+  "build": {
+    "builder": "DOCKERFILE",
+    "dockerfilePath": "services/bot/Dockerfile"
+  },
+  "deploy": {
+    "startCommand": "python -m byte_bot",
+    "restartPolicyType": "ON_FAILURE",
+    "restartPolicyMaxRetries": 10
+  }
+}