refactor(architecture): harden module boundaries

Tiku.Infrastructure/Commerce/Refunds/RefundAdministrationService.Notifications.cs

@@ -14,13 +14,13 @@ internal sealed partial class RefundAdministrationService
         CancellationToken cancellationToken = default)
     {
         var provider = NormalizeProvider(command.Provider);
-        var refund = await dbContext.CommerceRefundRequests.SingleOrDefaultAsync(
+        var refund = await commercePersistence.CommerceRefundRequests.SingleOrDefaultAsync(
             item => item.TenantId == tenantId && item.RefundNo == command.RefundNo,
             cancellationToken) ?? throw new CommerceException("Refund request was not found.", "refund_not_found");
         var eventId = string.IsNullOrWhiteSpace(command.EventId)
             ? $"{provider}:{command.RefundNo}:{command.Status}"
             : command.EventId.Trim();
-        var duplicate = await dbContext.PaymentEvents.AnyAsync(
+        var duplicate = await commercePersistence.PaymentEvents.AnyAsync(
             item => item.TenantId == tenantId &&
                     item.Provider == provider &&
                     item.EventType == "refund" &&
@@ -28,7 +28,7 @@ internal sealed partial class RefundAdministrationService
             cancellationToken);
         if (duplicate) return refund;
 
-        dbContext.PaymentEvents.Add(new PaymentEvent
+        commercePersistence.PaymentEvents.Add(new PaymentEvent
         {
             TenantId = tenantId,
             Provider = provider,
@@ -55,7 +55,7 @@ internal sealed partial class RefundAdministrationService
                 refund.FailedAt = DateTimeOffset.UtcNow;
             }
 
-            dbContext.CommerceRefundEvents.Add(new CommerceRefundEvent
+            commercePersistence.CommerceRefundEvents.Add(new CommerceRefundEvent
             {
                 TenantId = tenantId,
                 RefundRequestId = refund.Id,
@@ -66,7 +66,7 @@ internal sealed partial class RefundAdministrationService
             });
         }
 
-        await dbContext.SaveChangesAsync(cancellationToken);
+        await unitOfWork.SaveChangesAsync(cancellationToken);
         return refund;
     }
 }