fix(contribution): process all incomplete-unlock accounts in backfill (remove 100-limit)

Previous 100-account batch caused starvation: accounts at positions 101+
(including recent pre-planting users) were never processed. Remove limit
to process all eligible accounts in each 10-minute run.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/services/contribution-service/src/application/schedulers/contribution.scheduler.ts

@@ -302,7 +302,7 @@ export class ContributionScheduler implements OnModuleInit {
       this.logger.log('Starting contribution backfill scan...');
 
       // 查找解锁状态不完整的账户（已认种但层级<15或奖励档位<3）
-      const accounts = await this.contributionAccountRepository.findAccountsWithIncompleteUnlock(100);
+      const accounts = await this.contributionAccountRepository.findAccountsWithIncompleteUnlock();
 
       if (accounts.length === 0) {
         this.logger.debug('No accounts with incomplete unlock status found');

backend/services/contribution-service/src/infrastructure/persistence/repositories/contribution-account.repository.ts

@@ -239,7 +239,7 @@ export class ContributionAccountRepository implements IContributionAccountReposi
    * @param limit 返回的最大数量
    * @returns 解锁状态不完整的账户列表
    */
-  async findAccountsWithIncompleteUnlock(limit: number = 100): Promise<ContributionAccountAggregate[]> {
+  async findAccountsWithIncompleteUnlock(): Promise<ContributionAccountAggregate[]> {
     // 查找已认种但未达到满解锁状态的账户：
     // - unlockedLevelDepth < 15 或
     // - unlockedBonusTiers < 3
@@ -251,8 +251,6 @@ export class ContributionAccountRepository implements IContributionAccountReposi
           { unlockedBonusTiers: { lt: 3 } },
         ],
       },
-      orderBy: { updatedAt: 'asc' }, // 优先处理最久未更新的
-      take: limit,
     });
 
     return records.map((r) => this.toDomain(r));