feat(presence-service): 添加 init-db 命令创建数据库

- 添加 init-db 命令自动创建 rwa_presence 数据库
- 创建数据库后自动运行 prisma db push 创建表结构
- 更新帮助文档

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

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

backend/services/presence-service/deploy.sh

@@ -133,6 +133,16 @@ case "$1" in
         fi
         ;;
 
+    init-db)
+        log_info "Creating database rwa_presence..."
+        docker exec rwa-postgres psql -U rwa_user -d postgres -c "CREATE DATABASE rwa_presence;" 2>/dev/null || \
+            log_warn "Database may already exist"
+        log_success "Database rwa_presence created (or already exists)"
+        log_info "Running Prisma db push to create tables..."
+        docker exec "$CONTAINER_NAME" npx prisma db push --skip-generate 2>/dev/null || \
+            log_warn "Could not push schema (container may not be running)"
+        ;;
+
     migrate)
         log_info "Running migrations for $SERVICE_NAME..."
         docker exec "$CONTAINER_NAME" npx prisma migrate deploy
@@ -222,6 +232,7 @@ case "$1" in
         echo "  health         - Check service health"
         echo ""
         echo "Database Commands:"
+        echo "  init-db        - Create database and push schema"
         echo "  migrate        - Run database migrations (production)"
         echo "  migrate-dev    - Run dev migrations"
         echo "  db-push        - Push Prisma schema to database"