feat: 在消息查询中添加工具执行时长字段，增强消息记录功能

src/storage/mod.rs

@@ -1416,7 +1416,7 @@ impl SessionStore {
         let conn = self.conn.lock().expect("session db mutex poisoned");
         let mut stmt = conn.prepare(
             "
-            SELECT id, role, content, system_context, reasoning_content, media_refs_json, created_at, tool_call_id, tool_name, tool_calls_json
+            SELECT id, role, content, system_context, reasoning_content, media_refs_json, created_at, tool_call_id, tool_name, tool_calls_json, tool_duration_ms
             FROM messages
             WHERE topic_id = ?1
             ORDER BY seq ASC