fix(herdr-workspace): synchronize herdr runtime workspace label on spawn and resume

.agents/skills/multi-agent-mux-resume/scripts/resume_session.sh

@@ -63,6 +63,12 @@ else
   export HERDR_SESSION_NAME
 fi
 
+if [ -n "$HERDR_WORKSPACE_OPT" ]; then
+  export MAM_WS_LABEL="$HERDR_WORKSPACE_OPT"
+else
+  export MAM_WS_LABEL="$(resolve_herdr_workspace "$SESSION_NAME" "$WORKSPACE")"
+fi
+
 # 2. If herdr is alive, print warning or attach.
 if herdr has-session -t "$SESSION_NAME" 2>/dev/null; then
   if [ "${DRY_RUN:-0}" = "1" ]; then