ci: check for valid compilation artifacts in alpine stage (#284096)

* ci: check for valid compilation artifacts in alpine stage

* chore: address review feedback

* chore: improve logging

build/azure-pipelines/product-compile.yml

@@ -100,6 +100,23 @@ jobs:
           GITHUB_TOKEN: "$(github-distro-mixin-password)"
         displayName: Compile & Hygiene
 
+      - script: |
+          set -e
+
+          [ -d "out-build" ] || { echo "ERROR: out-build folder is missing" >&2; exit 1; }
+          [ -n "$(find out-build -mindepth 1 2>/dev/null | head -1)" ] || { echo "ERROR: out-build folder is empty" >&2; exit 1; }
+          echo "out-build exists and is not empty"
+
+          ls -d out-vscode-* >/dev/null 2>&1 || { echo "ERROR: No out-vscode-* folders found" >&2; exit 1; }
+          for folder in out-vscode-*; do
+            [ -d "$folder" ] || { echo "ERROR: $folder is missing" >&2; exit 1; }
+            [ -n "$(find "$folder" -mindepth 1 2>/dev/null | head -1)" ] || { echo "ERROR: $folder is empty" >&2; exit 1; }
+            echo "$folder exists and is not empty"
+          done
+
+          echo "All required compilation folders checked."
+        displayName: Validate compilation folders
+
       - script: |
           set -e
           npm run compile