feat(FN-3597): guard board and list column grouping against malformed colum

Merged FN-3597 feature branch adds two-step protection against malformed columns in the board and list views: Step 1 normalizes malformed column data at the core level, and Step 2 hardens the Board and ListView grouping logic to gracefully handle edge cases. The changeset covers test isolation impro

Fusion-Task-Id: FN-3597
Fusion-Task-Id: FN-3607

packages/dashboard/app/components/MissionManager.tsx

@@ -878,6 +878,7 @@ export function MissionManager({ isOpen, isInline = false, onClose, addToast, pr
 
       setMissionEvents((prev) => {
         if (!append) {
+          missionEventsRef.current = incomingEvents;
           return incomingEvents;
         }
 
@@ -888,6 +889,7 @@ export function MissionManager({ isOpen, isInline = false, onClose, addToast, pr
             merged.push(event);
           }
         }
+        missionEventsRef.current = merged;
         return merged;
       });