fix(deploy): resolve SQL timeouts, YAML drift, and orphaned tmux sessions

- lib.sh: update atomic_dump_yaml to sync with YAML on any active session status change; set reader timeouts to 60.0s
- create_session.sh: add exit trap cleanup_tmux_on_error to rollback spawned tmux sessions on initialization failures
- reconcile.sh, update_yaml_resumed.sh, status.sh, stop_session.sh: align SQLite connection timeout values to 60.0s

.agents/skills/multi-agent-mux-create/scripts/create_session.sh

@@ -145,6 +145,16 @@ fi
 
 spawn
 
+# Trap for rolling back/cleaning up tmux session if script exits due to error
+cleanup_tmux_on_error() {
+  local exit_code=$?
+  if [ $exit_code -ne 0 ]; then
+    echo "⚠️ Error occurred during initialization. Rolling back and killing tmux session '$SESSION_NAME'..." >&2
+    _tmux kill-session -t "$SESSION_NAME" 2>/dev/null || true
+  fi
+}
+trap cleanup_tmux_on_error EXIT
+
 # TUI 준비 대기
 wait_for_tui_ready "$SESSION_NAME" "$AGENT"
 
@@ -333,6 +343,8 @@ Task: $SUBMIT_JOB_PROMPT"
   WD_PID=$(start_watchdog "$DELEGATE_JOB_ID" "$WORKSPACE")
   echo "watchdog PID: $WD_PID"
 fi
+# Clear cleanup trap as registration was fully successful
+trap - EXIT
 echo "agent-sessions.yaml updated"
 echo
 if [ -n "${TMUX_SERVER_NAME:-}" ] && [ "$TMUX_SERVER_NAME" != "default" ]; then