修正 macOS 增量发布工具执行权限

scripts/deploy-from-workstation.ps1

@@ -232,6 +232,7 @@ function Get-RegctlPath {
     if (Test-Path -LiteralPath $regctlPath) {
         $actualHash = (Get-FileHash -LiteralPath $regctlPath -Algorithm SHA256).Hash.ToLowerInvariant()
         if ($actualHash -eq $expectedHash) {
+            if (-not $IsWindows) { chmod +x $regctlPath }
             return $regctlPath
         }
         Remove-Item -LiteralPath $regctlPath -Force
@@ -248,6 +249,7 @@ function Get-RegctlPath {
             throw "regctl 校验失败：预期 $expectedHash，实际 $actualHash。"
         }
         Move-Item -LiteralPath $downloadPath -Destination $regctlPath -Force
+        if (-not $IsWindows) { chmod +x $regctlPath }
     }
     finally {
         if (Test-Path -LiteralPath $downloadPath) {