feat(saas): implement marketplace and tenant onboarding

Tiku.Application/Security/FeatureQuotaConsumptionExtensions.cs

@@ -0,0 +1,26 @@
+namespace Tiku.Application.Security;
+
+public static class FeatureQuotaConsumptionExtensions
+{
+    public static async Task<bool> ConsumeQuotaIfConfiguredAsync(
+        this IFeatureAccessService featureAccessService,
+        Guid tenantId,
+        string metricCode,
+        long amount = 1,
+        CancellationToken cancellationToken = default)
+    {
+        var configured = (await featureAccessService.GetQuotaSummaryAsync(tenantId, cancellationToken))
+            .Any(item => string.Equals(item.MetricCode, metricCode, StringComparison.Ordinal));
+        if (!configured)
+        {
+            return false;
+        }
+
+        if (!await featureAccessService.TryConsumeQuotaAsync(tenantId, metricCode, amount, cancellationToken))
+        {
+            throw new FeatureAccessException("The tenant feature quota has been exhausted.", "feature_quota_exhausted");
+        }
+
+        return true;
+    }
+}