fix(FN-2872): reduce blocked-task log noise and clarify routing details

- Add a Node Routing section in TaskDetailModal showing override, effective node/source, unavailable-node policy, and blocking reason
- Remove duplicate blocked-state heartbeat log output when the blocked reason has not changed
- Silence runtime onBlocked logging to avoid repeated blocked-task log spam

packages/engine/src/runtimes/in-process-runtime.ts

@@ -284,9 +284,8 @@ export class InProcessRuntime
           this.recordActivity();
           runtimeLog.log(`Scheduled task ${task.id}`);
         },
-        onBlocked: (task, blockedBy) => {
-          runtimeLog.log(`Task ${task.id} blocked by: ${blockedBy.join(", ")}`);
-        },
+        onBlocked: () => {},
+
       });
 
       // 5b. Initialize TaskExecutor