Fix summary upload: use relative path for .audit directory

Using ${{ github.workspace }}/.audit/ caused path resolution issues
where the checksum generation found files but upload-artifact@v4
reported "No files found". Changed to relative path .audit/ which
is more reliable.

Note: This work was completed with AI assistance (Claude Code).

Author: oberstet

.github/workflows/wstest.yml

@@ -680,7 +680,8 @@ jobs:
         with:
           name: conformance-summary-${{ env.TEST_MODE }}
           # upload-artifact-verified requires a directory, not a file
-          path: ${{ github.workspace }}/.audit/
+          # Use relative path to avoid any workspace path resolution issues
+          path: .audit/
           retention-days: 30
 
       - name: Report summary