feat(discord): add win/loss status to match messages

- Added win field to serialize_match_for_discord return data
  - Display victory/defeat emoji and text at start of match messages
  - Extract win status directly from data instead of inferring from embed color

discord_bot.py

@@ -51,15 +51,17 @@ async def send_message(channel):
     data = await dota.serialize_match_for_discord(match_)
     logger.info(f"sending match {match_['match_id']}, {data}")
     try:
-      # 从embed中提取朋友信息
+      # 从embed中提取朋友信息，并添加胜负状态
       friends_info = ""
+      win_status = "✅ **胜利** " if data.get('win') else "❌ **失败** "
+
       if data['embeds'] and len(data['embeds']) > 0:
         embed = data['embeds'][0]
         if 'fields' in embed and len(embed['fields']) > 2:
           # 第三个field包含了朋友信息
           field = embed['fields'][2]
           if 'value' in field and field['value']:
-            friends_info = f"**{field['value']}** 的比赛：\n\n"
+            friends_info = f"{win_status}**{field['value']}** 的比赛：\n\n"
       
       # 将朋友信息放在内容开头，连胜连败消息只在第一场比赛时添加
       content = data['content']

dota.py

@@ -503,6 +503,7 @@ async def serialize_match_for_discord(match_):
   data = {
     "content": content,
     "tts": False,
+    "win": win,
     "embeds": [
       {
         "color": color,