fix(reporting-service): 修复统计 incrementPlanting 对 undefined 参数的处理

当 planting.order.paid 事件中 treeCount 为 undefined 时：
- GlobalStatsRepository: 使用 ?? 0 提供默认值
- RealtimeStatsRepository: 使用 ?? 0 提供默认值
- 避免 Prisma upsert 因 undefined increment 值而报错

问题原因：planting-service 发送的事件数据中 treeCount 可能为 undefined

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/services/reporting-service/src/infrastructure/persistence/repositories/global-stats.repository.impl.ts

@@ -34,22 +34,26 @@ export class GlobalStatsRepository implements IGlobalStatsRepository {
     treeCount: number,
     amount: Decimal,
   ): Promise<GlobalStatsData> {
+    // [2026-01-07] 修复：防御性处理，确保 treeCount 不为 undefined
+    const safeTreeCount = treeCount ?? 0;
+    const safeAmount = amount ?? new Decimal(0);
+
     this.logger.debug(
-      `Incrementing global planting: trees=${treeCount}, amount=${amount}`,
+      `Incrementing global planting: trees=${safeTreeCount}, amount=${safeAmount}`,
     );
 
     const result = await this.prisma.globalStats.upsert({
       where: { statsKey: this.GLOBAL_KEY },
       create: {
         statsKey: this.GLOBAL_KEY,
-        totalPlantingCount: treeCount,
+        totalPlantingCount: safeTreeCount,
         totalOrderCount: 1,
-        totalPlantingAmount: amount,
+        totalPlantingAmount: safeAmount,
       },
       update: {
-        totalPlantingCount: { increment: treeCount },
+        totalPlantingCount: { increment: safeTreeCount },
         totalOrderCount: { increment: 1 },
-        totalPlantingAmount: { increment: amount },
+        totalPlantingAmount: { increment: safeAmount },
       },
     });
 

backend/services/reporting-service/src/infrastructure/persistence/repositories/realtime-stats.repository.impl.ts

@@ -46,22 +46,26 @@ export class RealtimeStatsRepository implements IRealtimeStatsRepository {
     amount: Decimal,
   ): Promise<RealtimeStatsData> {
     const statsDate = this.normalizeDate(date);
+    // [2026-01-07] 修复：防御性处理，确保 treeCount 不为 undefined
+    const safeTreeCount = treeCount ?? 0;
+    const safeAmount = amount ?? new Decimal(0);
+
     this.logger.debug(
-      `Incrementing planting: date=${statsDate.toISOString()}, trees=${treeCount}, amount=${amount}`,
+      `Incrementing planting: date=${statsDate.toISOString()}, trees=${safeTreeCount}, amount=${safeAmount}`,
     );
 
     const result = await this.prisma.realtimeStats.upsert({
       where: { statsDate },
       create: {
         statsDate,
-        dailyPlantingCount: treeCount,
+        dailyPlantingCount: safeTreeCount,
         dailyOrderCount: 1,
-        dailyPlantingAmount: amount,
+        dailyPlantingAmount: safeAmount,
       },
       update: {
-        dailyPlantingCount: { increment: treeCount },
+        dailyPlantingCount: { increment: safeTreeCount },
         dailyOrderCount: { increment: 1 },
-        dailyPlantingAmount: { increment: amount },
+        dailyPlantingAmount: { increment: safeAmount },
       },
     });