Add wait events for COPY file/program operations#11

NikolayS wants to merge 1 commit intoclaude/review-postgres-discussions-n0hWBNikolayS/postgres:claude/review-postgres-discussions-n0hWBfrom

claude/copy-wait-events-n0hWBNikolayS/postgres:claude/copy-wait-events-n0hWBCopy head branch name to clipboard