MONDAY, OCTOBER 21 PARIS: French lawmakers begin debating a plan for deep budget cuts that threatens to topple the new government of Prime Minister Michel Barnier. WASHINGTON: Annual meetings of the World Bank and the International Monetary Fund begin (until Saturday). *CALI, COLOMBIA: UN Biodiversity Conference (COP16) opens (until November 1). *CANBERRA: British King Charles III and Queen Camilla visit the Australian parliament APIA: Biennial Commonwealth Heads of Government meeting, which King Charles III is set to attend later in the week, opens in Samoa (until Saturday). LUXEMBOURG: Top E…