fix(output): remove partial artifacts on failure

output/Docker/watch_and_convert.py

@@ -99,7 +99,12 @@ def process_markdown(md_file: Path) -> None:
     output_pdf = out_dir / f"{stem}.pdf"
 
     logging.info("Processing %s", md_file.name)
-    run_pandoc(md_file, output_docx, output_pdf)
+    try:
+        run_pandoc(md_file, output_docx, output_pdf)
+    except subprocess.CalledProcessError:
+        output_docx.unlink(missing_ok=True)
+        output_pdf.unlink(missing_ok=True)
+        raise
 
     processed_target = processed_dir / md_file.name
     counter = 1