fix(tenant): declare the wallet ledger index on the entity

Phase 6 created idx_wallet_user_recorded_entity in the migration but never
declared it on WalletTransaction, so doctrine:schema:validate reported the
production database as out of sync with the mapping.

The index itself is right — WalletTransactionRepository::findByUserForEnvironment
filters on exactly (user_id, recorded_entity_type, recorded_entity_id). Only the
attribute was missing. No migration is needed; the index already exists.

This matters beyond tidiness: while validate is red it cannot be used to detect
real drift.

schema:validate is now green on both mapping and database.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/Settlement/Entity/WalletTransaction.php

@@ -12,6 +12,8 @@ use Symfony\Component\Uid\Uuid;
 #[ORM\Table(name: 'wallet_transactions')]
 #[ORM\Index(columns: ['user_id', 'created_at'], name: 'idx_wallet_user_date')]
 #[ORM\Index(columns: ['user_id', 'type'], name: 'idx_wallet_user_type')]
+// دفترِ per-محیطِ یک شخص: WalletTransactionRepository::findByUserForEnvironment()
+#[ORM\Index(columns: ['user_id', 'recorded_entity_type', 'recorded_entity_id'], name: 'idx_wallet_user_recorded_entity')]
 class WalletTransaction
 {
     public const TYPE_CREDIT = 'credit';