feat(core): harden sessions settlement and credit activity

.env.example

@@ -67,6 +67,9 @@ LOTTERY_DRAW_INTERVAL_MINUTES=5
 LOTTERY_DRAW_BETTING_WINDOW_SECONDS=270
 LOTTERY_DRAW_CLOSE_BEFORE_SECONDS=30
 LOTTERY_DRAW_BUFFER_AHEAD=8
+# 自动派彩失败后按 60s、120s、240s... 指数退避，最长每小时重试一次
+LOTTERY_AUTO_PAYOUT_RETRY_BASE_SECONDS=60
+LOTTERY_AUTO_PAYOUT_RETRY_MAX_SECONDS=3600
 LOTTERY_PLAYER_AUTH_DEV_BYPASS=false
 ADMIN_API_TOKEN_TTL_DAYS=7