fix(authorization): fix race condition in reward distribution calculation

When calculating reward distribution for community/province/city benefits,
the totalTeamPlantingCount was being read after referral-service had already
updated it with the current planting. This caused incorrect distribution
where benefits were given to the community holder before they completed
their assessment target.

Fix: Subtract treeCount from rawTeamCount to restore the "before planting"
team count, ensuring correct assessment calculation.

Affected methods:
- getCommunityRewardDistribution
- getProvinceTeamRewardDistribution
- getCityTeamRewardDistribution

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

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

backend/services/authorization-service/src/application/services/authorization-application.service.ts

@@ -859,12 +859,20 @@ export class AuthorizationApplicationService {
     const communityStats = await this.statsRepository.findByAccountSequence(
       nearestCommunity.userId.accountSequence,
     )
-    const currentTeamCount = communityStats?.totalTeamPlantingCount ?? 0
+    const rawTeamCount = communityStats?.totalTeamPlantingCount ?? 0
+
+    // 重要：由于 referral-service 和 reward-service 都消费同一个 Kafka 事件，
+    // 存在竞态条件，此时查询到的 totalTeamPlantingCount 可能已经包含了本次认种。
+    // 因此需要减去本次认种数量来还原"认种前"的团队数。
+    // 注意：如果 referral-service 还没处理完，rawTeamCount 可能还是旧值，
+    // 此时 currentTeamCount 可能为负数，需要取 max(0, ...)
+    const currentTeamCount = Math.max(0, rawTeamCount - treeCount)
     const initialTarget = nearestCommunity.getInitialTarget() // 社区初始考核目标：10棵
 
     this.logger.debug(
       `[getCommunityRewardDistribution] Community ${nearestCommunity.userId.accountSequence} ` +
-      `benefitActive=false, currentTeamCount=${currentTeamCount}, initialTarget=${initialTarget}`,
+      `benefitActive=false, rawTeamCount=${rawTeamCount}, treeCount=${treeCount}, ` +
+      `currentTeamCount(before)=${currentTeamCount}, initialTarget=${initialTarget}`,
     )
 
     // 6. 查找上级社区（用于接收考核前的权益）
@@ -1023,9 +1031,15 @@ export class AuthorizationApplicationService {
 
     // 5. 权益未激活，计算考核分配
     const stats = await this.statsRepository.findByAccountSequence(nearestAuthProvince.userId.accountSequence)
-    const currentTeamCount = stats?.totalTeamPlantingCount ?? 0
+    const rawTeamCount = stats?.totalTeamPlantingCount ?? 0
+    // 修复竞态条件：减去本次认种数量来还原"认种前"的团队数
+    const currentTeamCount = Math.max(0, rawTeamCount - treeCount)
     const initialTarget = nearestAuthProvince.getInitialTarget() // 500棵
 
+    this.logger.debug(
+      `[getProvinceTeamRewardDistribution] rawTeamCount=${rawTeamCount}, treeCount=${treeCount}, currentTeamCount(before)=${currentTeamCount}`,
+    )
+
     // 6. 查找上级（用于接收考核前的权益）
     let parentAccountSequence: number = HEADQUARTERS_ACCOUNT_SEQUENCE
     let parentReason = '上级为总部社区'
@@ -1227,9 +1241,15 @@ export class AuthorizationApplicationService {
 
     // 5. 权益未激活，计算考核分配
     const stats = await this.statsRepository.findByAccountSequence(nearestAuthCity.userId.accountSequence)
-    const currentTeamCount = stats?.totalTeamPlantingCount ?? 0
+    const rawTeamCount = stats?.totalTeamPlantingCount ?? 0
+    // 修复竞态条件：减去本次认种数量来还原"认种前"的团队数
+    const currentTeamCount = Math.max(0, rawTeamCount - treeCount)
     const initialTarget = nearestAuthCity.getInitialTarget() // 100棵
 
+    this.logger.debug(
+      `[getCityTeamRewardDistribution] rawTeamCount=${rawTeamCount}, treeCount=${treeCount}, currentTeamCount(before)=${currentTeamCount}`,
+    )
+
     // 6. 查找上级
     let parentAccountSequence: number = HEADQUARTERS_ACCOUNT_SEQUENCE
     let parentReason = '上级为总部社区'