WIP/DEBUG: add debugging to diagnose baipp failures - DO NOT MERGE

This is a temporary debugging commit to understand why build-and-inspect-python-package is failing.

Changes:
- Added 'continue-on-error: true' to build steps so workflow continues on failure
- Added 'if: always()' debug steps to list directory structure even after failures
- Download artifacts to separate paths (dist-vcs/, dist-scm/) to avoid conflicts
- Added explicit combine step that copies packages to dist/
- Debug steps check dist/, out/, and file tree to understand baipp output structure

THIS IS A HACK FOR DEBUGGING ONLY.
DO NOT MERGE THIS COMMIT TO MAIN.
Once we understand the baipp failure, this should be reverted and replaced with proper fixes.

Author: RonnyPfannschmidt

.github/workflows/python-tests.yml

@@ -32,27 +32,61 @@ jobs:
           fetch-depth: 0
 
       - name: Build vcs-versioning
+        continue-on-error: true
         uses: hynek/build-and-inspect-python-package@v2
         with:
           path: nextgen/vcs-versioning
           upload-name-suffix: -vcs-versioning
 
+      - name: Debug - List vcs-versioning build output
+        if: always()
+        run: |
+          echo "=== Listing nextgen/vcs-versioning/dist/ ==="
+          ls -la nextgen/vcs-versioning/dist/ || echo "Directory does not exist"
+          echo "=== Listing nextgen/vcs-versioning/out/ ==="
+          ls -la nextgen/vcs-versioning/out/ || echo "Directory does not exist"
+          echo "=== Listing current directory ==="
+          ls -la
+          echo "=== Tree view of nextgen/vcs-versioning ==="
+          find nextgen/vcs-versioning/ -type f -o -type d | sort | head -100
+
       - name: Build setuptools-scm
+        continue-on-error: true
         uses: hynek/build-and-inspect-python-package@v2
         with:
           upload-name-suffix: -setuptools-scm
 
+      - name: Debug - List setuptools-scm build output
+        if: always()
+        run: |
+          echo "=== Listing dist/ ==="
+          ls -la dist/ || echo "Directory does not exist"
+          echo "=== Listing out/ ==="
+          ls -la out/ || echo "Directory does not exist"
+          echo "=== Listing current directory ==="
+          ls -la
+          echo "=== Tree view of project root ==="
+          find . -maxdepth 3 -name "*.whl" -o -name "*.tar.gz" -o -type d | sort | head -100
+
       - name: Download vcs-versioning packages
         uses: actions/download-artifact@v4
         with:
           name: Packages-vcs-versioning
-          path: dist/
+          path: dist-vcs/
 
       - name: Download setuptools-scm packages
         uses: actions/download-artifact@v4
         with:
           name: Packages-setuptools-scm
-          path: dist/
+          path: dist-scm/
+
+      - name: Combine packages
+        run: |
+          mkdir -p dist
+          cp dist-vcs/*.whl dist-vcs/*.tar.gz dist/ 2>/dev/null || true
+          cp dist-scm/*.whl dist-scm/*.tar.gz dist/ 2>/dev/null || true
+          echo "=== Combined packages ==="
+          ls -la dist/
 
       - name: Upload combined packages
         uses: actions/upload-artifact@v4