feat: add bot-triggered deployment via /update deploy command

- Added Docker socket mount to docker-compose.prod.yml
- Added project directory mount for git operations
- Added performDeploy, isDeployAvailable methods to UpdateService
- Added /update deploy subcommand for Discord-triggered deployments
- Added deploy-related embeds to update.view.ts

docker-compose.prod.yml

@@ -39,7 +39,13 @@ services:
     image: aurora-app:latest
     ports:
       - "127.0.0.1:3000:3000"
-    # NO source code volumes - production image is self-contained
+    # Volumes for bot-triggered deployments
+    volumes:
+      # Docker socket - allows bot to run docker compose commands
+      - /var/run/docker.sock:/var/run/docker.sock
+      # Project directory - allows git pull and rebuild
+      - .:/app/deploy
+    working_dir: /app
     environment:
       - NODE_ENV=production
       - HOST=0.0.0.0
@@ -52,6 +58,8 @@ services:
       - DISCORD_GUILD_ID=${DISCORD_GUILD_ID}
       - DISCORD_CLIENT_ID=${DISCORD_CLIENT_ID}
       - DATABASE_URL=postgresql://${DB_USER}:${DB_PASSWORD}@db:5432/${DB_NAME}
+      # Deploy directory path for bot-triggered deployments
+      - DEPLOY_DIR=/app/deploy
     depends_on:
       db:
         condition: service_healthy