feat: prepare sellable source delivery edition

scripts/release/get-app-version.ps1

@@ -0,0 +1,14 @@
+param(
+  [string]$PomPath = (Join-Path $PSScriptRoot '..\..\backend\pom.xml')
+)
+
+$resolvedPath = Resolve-Path -LiteralPath $PomPath -ErrorAction Stop
+[xml]$pom = Get-Content -LiteralPath $resolvedPath -Raw -Encoding UTF8
+$version = $pom.project.version
+
+if ([string]::IsNullOrWhiteSpace($version)) {
+  Write-Error "Failed to read <project><version> from $resolvedPath"
+  exit 1
+}
+
+Write-Output $version.Trim()