Add packaging discussion thread

Author: encukou

peps/pep-0803.rst

@@ -7,7 +7,8 @@ Type: Standards Track
 Requires: 703, 793, 697
 Created: 19-Aug-2025
 Python-Version: 3.15
-Post-History: `08-Sep-2025 <https://discuss.python.org/t/103628>`__
+Post-History: `08-Sep-2025 <https://discuss.python.org/t/103628>`__,
+              `20-Nov-2025 <https://discuss.python.org/t/104976>`__,
 
 
 Abstract