fix(billing): $sortArray in listLedgerPage requires MongoDB 5.2+ (fails on 5.0.x)

[PierreBrisorgueil]

Problem

modules/billing/repositories/billing.extraBalance.repository.js uses \$sortArray in an aggregation pipeline, which requires MongoDB 5.2+. The integration test billing.extraBalance.listLedger.perf.integration.tests.js (added in devkit) fails on local environments running MongoDB 5.0.x:

MongoServerError: Invalid \$project :: caused by :: Unrecognized expression '\$sortArray'

Discovered during /update-stack on pierreb_node (local MongoDB 5.0.7).

Affected files

• modules/billing/repositories/billing.extraBalance.repository.js (line ~425)
• modules/billing/tests/billing.extraBalance.listLedger.perf.integration.tests.js

Steps to reproduce

1. Run against MongoDB 5.0.x: NODE_ENV=pierreb npm run test:integration
2. The listLedgerPage integration tests fail with Unrecognized expression '$sortArray'

Fix options

• Either document MongoDB ≥5.2 as a minimum requirement in README
• Or replace \$sortArray with a \$sort stage on the outer pipeline (compatible with 5.0)