fix: 更新 generate_market_slug 格式，新增年份字段

trader/auto_trade_polymarket.py

@@ -280,6 +280,7 @@ class PolymarketBTCTrader:
         
         month_name = self.MONTH_NAMES[target_time.month]
         day = target_time.day
+        year = target_time.year
         
         # 转换为12小时制
         hour_24 = target_time.hour
@@ -296,7 +297,7 @@ class PolymarketBTCTrader:
             hour_12 = hour_24 - 12
             am_pm = 'pm'
         
-        slug = f"bitcoin-up-or-down-{month_name}-{day}-{hour_12}{am_pm}-et"
+        slug = f"bitcoin-up-or-down-{month_name}-{day}-{year}-{hour_12}{am_pm}-et"
         return slug
     
     def get_market_by_slug(self, slug: str) -> Optional[Dict]: