07730dd24c
Phase 1: workflow subcommand group (add/list/show/rm/history/rollback) Phase 2: thread subcommand group (run/list/show/rm/fork/ps/kill/live/pause/resume) Phase 3: cas gc + top-level aliases + deprecation warnings for old flat commands - Follow existing CAS_SUBCOMMAND_TABLE pattern for workflow and thread groups - Top-level 'run' and 'live' stay as shortcuts (no deprecation) - Old flat commands print deprecation warning then delegate - Update usage string to show grouped format - Update tests to use new grouped syntax