fix(skills): resolve session resolution, add cancelled event status, and scope mqtt topic

.agents/skills/multi-agent-mux-delegate-job/scripts/publish_event.py

@@ -45,13 +45,14 @@ from mqtt_common import (
 
 logger = logging.getLogger("delegate_job.publish_event")
 
-VALID_EVENTS = ("started", "permission_required", "progress", "completed", "error")
-TERMINAL_EVENTS = ("completed", "error")
+VALID_EVENTS = ("started", "permission_required", "progress", "completed", "error", "cancelled")
+TERMINAL_EVENTS = ("completed", "error", "cancelled")
 # event -> registry status to sync as a best-effort side effect
 EVENT_TO_STATUS = {
     "started": "running",
     "completed": "completed",
     "error": "error",
+    "cancelled": "cancelled",
 }
 
 CONNECT_ACK_TIMEOUT = 10  # seconds to wait for CONNACK