feat(server): improve task CLI with steering, execution order, and planner guidance

- Fix steering notes to check scope task instead of leaf task
- Fix NOT_DONE replan to use scope for bird's eye view
- Pass reason to planner prompt ("Why you were called" section)
- Add execution-order.ts with reusable computeExecutionOrder and buildSortedChildrenMap
- Make 'tree' an alias for 'plan' command
- Add comprehensive help text for run command and acceptance criteria
- Add planner guidance for propagating requirements to subtasks

packages/server/src/server/agent/agent-manager.ts

@@ -1013,6 +1013,10 @@ export class AgentManager {
   }
 
   private dispatchStream(agentId: string, event: AgentStreamEvent): void {
+    const eventDesc = event.type === "timeline"
+      ? `timeline:${event.item.type}${event.item.type === "tool_call" ? `:${(event.item as any).name}` : ""}`
+      : event.type;
+    console.error(`[AGENT-MANAGER:dispatchStream] agentId=${agentId.substring(0, 8)} event=${eventDesc} t=${Date.now()}`);
     this.dispatch({ type: "agent_stream", agentId, event });
   }