feat: 实现 AgentScope ReAct Runner 两阶段执行并重构事件处理

backend/src/schemas/messages/chat_message.py

@@ -1,12 +1,14 @@
 from __future__ import annotations
 
 from datetime import datetime
+from decimal import Decimal
 from typing import ClassVar
 from uuid import UUID
 
-from pydantic import BaseModel, ConfigDict
+from pydantic import BaseModel, ConfigDict, Field
+from schemas.agent.runtime_models import RouterAgentOutput, WorkerAgentOutputRich
 
-from ..agent import AgentType, ToolAgentOutput, WorkerAgentOutput
+from ..agent import AgentType, ToolAgentOutput
 
 
 class UserMessageAttachments(BaseModel):
@@ -22,8 +24,9 @@ class AgentChatMessageMetadata(BaseModel):
     run_id: str
     agent_type: AgentType | None = None
     user_message_attachments: UserMessageAttachments | None = None
+    router_agent_output: RouterAgentOutput | None = None
     tool_agent_output: ToolAgentOutput | None = None
-    worker_agent_output: WorkerAgentOutput | None = None
+    worker_agent_output: WorkerAgentOutputRich | None = None
 
 
 class AgentChatMessage(BaseModel):
@@ -35,5 +38,11 @@ class AgentChatMessage(BaseModel):
     seq: int
     role: str
     content: str
+    model_code: str | None = None
+    tool_name: str | None = None
+    input_tokens: int = Field(default=0, ge=0)
+    output_tokens: int = Field(default=0, ge=0)
+    cost: Decimal = Field(default=Decimal("0"))
+    latency_ms: int | None = Field(default=None, ge=0)
     metadata: AgentChatMessageMetadata | dict[str, object] | None = None
     timestamp: datetime