fix: 修复 Arch 远程源码打包并发布 0.1.15

AI-assisted-by: Codex

AI-model: gpt-5.6-sol

AI-reasoning-effort: medium

Co-authored-by: Codex <codex@openai.com>

.github/workflows/release.yml

@@ -204,8 +204,10 @@ jobs:
           path: release
           merge-multiple: true
 
-      - name: 附带构建使用的 flake.lock
-        run: cp flake.lock release/flake.lock
+      - name: 附带发行元数据
+        run: |
+          cp flake.lock release/flake.lock
+          cp packaging/arch/PKGBUILD release/PKGBUILD
 
       - uses: softprops/action-gh-release@v2
         with: