feat: 添加结算功能，更新 TicketItem 模型以支持最新结算详情，增强 DrawTickService 以自动处理结算，更新 TicketWalletService 以支持派彩入账，扩展 API 路由以管理结算批次和奖池

app/Services/Jackpot/JackpotContributionService.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace App\Services\Jackpot;
+
+use App\Models\Draw;
+use App\Models\JackpotContribution;
+use App\Models\JackpotPool;
+use App\Models\TicketItem;
+
+/**
+ * 产品文档 §5.11.1：每笔有效注单按比例蓄水（在下注成功路径调用，非结算）。
+ */
+final class JackpotContributionService
+{
+    public function recordFromPlacedTicketItem(TicketItem $item, Draw $draw, string $currencyCode): void
+    {
+        $currency = strtoupper($currencyCode);
+        $pool = JackpotPool::query()
+            ->where('currency_code', $currency)
+            ->where('status', 1)
+            ->lockForUpdate()
+            ->first();
+
+        if ($pool === null) {
+            return;
+        }
+
+        if ((int) $item->actual_deduct_amount < (int) $pool->min_bet_amount) {
+            return;
+        }
+
+        $rate = (float) $pool->contribution_rate;
+        $contrib = (int) floor((int) $item->actual_deduct_amount * $rate);
+        if ($contrib <= 0) {
+            return;
+        }
+
+        JackpotContribution::query()->create([
+            'jackpot_pool_id' => $pool->id,
+            'draw_id' => $draw->id,
+            'player_id' => $item->player_id,
+            'ticket_item_id' => $item->id,
+            'contribution_amount' => $contrib,
+            'currency_code' => $currency,
+        ]);
+
+        $pool->forceFill([
+            'current_amount' => (int) $pool->current_amount + $contrib,
+        ])->save();
+    }
+}