ci: Add debug workflow to inspect Windows sha256sum line endings

Author: beekld

.github/workflows/debug-windows-line-endings.yml

@@ -0,0 +1,35 @@
+name: debug-windows-line-endings
+
+on:
+  push:
+    branches:
+      - 'beeklimt/debug-windows-line-endings'
+  workflow_dispatch:
+
+jobs:
+  inspect:
+    runs-on: windows-2022
+    steps:
+      - name: Inspect sha256sum output bytes on Git Bash
+        shell: bash
+        run: |
+          set -e
+
+          printf 'one\n' > one.bin
+          printf 'two\n' > two.bin
+          printf 'three\n' > three.bin
+
+          echo
+          echo '==== raw sha256sum stdout (od -c) ===='
+          sha256sum one.bin two.bin three.bin | od -c
+
+          echo
+          echo '==== base64 round-trip via env var (mirrors GITHUB_OUTPUT path) ===='
+          HASHES_WINDOWS=$(sha256sum one.bin two.bin three.bin | base64 -w0)
+          echo "$HASHES_WINDOWS" | base64 -d > checksums.txt
+          od -c checksums.txt
+          echo "wc -l: $(wc -l < checksums.txt), file size: $(wc -c < checksums.txt)"
+
+          echo
+          echo '==== Node os.EOL on this runner ===='
+          node -e "console.log(JSON.stringify(require('os').EOL))"