[WIP] Add schedule configuration for automated builds

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

Original prompt

在 .github/workflows/build.yml 的 on 触发器中添加 schedule 配置，使工作流每 5 小时自动构建一次。

具体改动：在 release 和 workflow_dispatch 之间添加以下内容：

  # Runs every 5 hours
  schedule:
    - cron: "0 */5 * * *"

完整的 on 部分应为：

on:
  # Runs on pushes targeting the default branch
  push:
    branches: ["main"]
  release:
    types: [published]

  # Runs every 5 hours
  schedule:
    - cron: "0 */5 * * *"

  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:

其余部分保持不变。

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