fix: 修正PVP模型PlayerID类型并优化空值处理

modules/player/model/pvp.go

@@ -14,7 +14,7 @@ const TableNamePlayerPVP = "player_pvp"
 // PVP 对应数据库表 player_pvp，用于记录用户PVP赛季数据及场次统计
 type PVP struct {
 	*cool.Model
-	PlayerID uint64 `gorm:"not null;index:idx_pvp_player_id;comment:'所属玩家ID'" json:"player_id"`
+	PlayerID uint32 `gorm:"not null;index:idx_pvp_player_id;comment:'所属玩家ID'" json:"player_id"`
 	//本赛季排名信息'通过下标来确认当前赛季
 	RankInfo []PVPRankInfo `gorm:"type:jsonb;not null;comment:'赛季核心数据'" json:"season_data"`
 }