feat(loyalty): remove paying with EnakPoint

EnakPoint can only be redeemed for vouchers now: it can no longer pay for
orders and is never cashed out (docs/enakgame-prd.md §3.2, EG-001,
EG-002). No order was ever paid with EnakPoint, so there is no data to
move.

Removed:
- POST /customer/wallet/payment-code, POST /customer/orders/:id/pay-with-points
  and GET /orders/:id/point-payment/preview, with their processors,
  repositories, services, handlers and tests.
- The point payment method type: paying, splitting and refunding with it,
  the outlet filter on the method list, and the system-method guard.
- points and payment_code on CreatePayment; points_used and point_value
  on payments; accepts_point_payment on the customer outlets.
- The outlet point_payment settings. A PUT that still sends them is
  rejected as an unknown field.
- The EnakPoint split in the payment method analytics.
- PAYMENT and PAYMENT_REFUND from the wallet type rules. Tests that used
  them as a generic EnakPoint debit use REWARD_REDEEM.
- The EnakPoint-paid part from the earning basis, which is
  subtotal − discount again.

Migration 000102 drops the trigger, the point methods and their index,
the payments columns, and the outlet settings, and restores the method
type CHECK without point. payments.payment_method_id is ON DELETE
RESTRICT, so it fails rather than lose a payment made with EnakPoint.

The integration docs list the removed endpoints and fields, and the
EnakPoint & EnakCoin PRD and tasks note what is superseded.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/processor/wallet_trace_processor_test.go

@@ -82,8 +82,8 @@ func findRow(t *testing.T, e *walletMoveEnv, customerID uuid.UUID, txType string
 }
 
 // The example of §8: A has 100 from #ORD-1 and 50 from #ORD-2, sends 120 to B, and B
-// pays 30. Tracing B's payment leads to A's order #ORD-1.
-func TestWalletTrace_PaymentLeadsBackToTheSendersOrder(t *testing.T) {
+// redeems 30. Tracing B's redemption leads to A's order #ORD-1.
+func TestWalletTrace_RedemptionLeadsBackToTheSendersOrder(t *testing.T) {
 	e := newWalletMoveEnv(t)
 	a := e.member("Anita", "081200005678")
 	b := e.member("Budi Santoso", "081234561234")
@@ -95,14 +95,14 @@ func TestWalletTrace_PaymentLeadsBackToTheSendersOrder(t *testing.T) {
 	e.credit(t, ord2)
 	_, err := e.transfers(nil).Transfer(e.ctx, a, sendPoints(120, "081234561234"), "482913", "key-1", models.CustomerPinRequestInfo{})
 	require.NoError(t, err)
-	payment, err := e.p.Debit(e.ctx, pay(b, 30))
+	payment, err := e.p.Debit(e.ctx, redeem(b, 30))
 	require.NoError(t, err)
 
 	p := NewWalletTraceProcessor(walletTraceRepoFake{e})
 	trace, err := p.Trace(e.ctx, e.org, payment.Transaction.ID)
 	require.NoError(t, err)
 
-	assert.Equal(t, constants.WalletTxTypePayment, trace.Transaction.Type)
+	assert.Equal(t, constants.WalletTxTypeRewardRedeem, trace.Transaction.Type)
 	assert.Equal(t, "Budi Santoso", trace.Transaction.Customer.Name)
 	require.Len(t, trace.Lots, 1)
 	assert.Equal(t, int64(30), trace.Lots[0].Amount)