Chris/schy 325 add c to e2e test suite

.fernignore

@@ -6,6 +6,7 @@ CLAUDE.md
 LICENSE
 README.md
 examples/
+testapp/
 src/SchematicHQ.Client.Test/Cache/
 src/SchematicHQ.Client.Test/Datastream/
 src/SchematicHQ.Client.Test/Integration/

src/SchematicHQ.Client.Test/Datastream/ReplicatorHealthServiceTests.cs

@@ -49,15 +49,20 @@ public async Task PerformHealthCheck_WhenReplicatorReady_SetsHealthyToTrue()
 
             var service = new ReplicatorHealthService(httpClient, "http://test/ready", logger);
 
-            // Act
-            service.Start();
-
-            // Wait for health check to complete
-            await Task.Delay(100);
+            try
+            {
+                // Act — drive the check synchronously instead of racing Start()'s background
+                // task. GetCacheVersionAsync awaits PerformHealthCheck directly.
+                await service.GetCacheVersionAsync();
 
-            // Assert
-            Assert.That(service.IsHealthy, Is.True);
-            Assert.That(service.CacheVersion, Is.EqualTo("test123"));
+                // Assert
+                Assert.That(service.IsHealthy, Is.True);
+                Assert.That(service.CacheVersion, Is.EqualTo("test123"));
+            }
+            finally
+            {
+                service.Dispose();
+            }
         }
 
         [Test]
@@ -96,15 +101,19 @@ public async Task PerformHealthCheck_WhenReplicatorNotReady_SetsHealthyToFalse()
 
             var service = new ReplicatorHealthService(httpClient, "http://test/ready", logger);
 
-            // Act
-            service.Start();
-
-            // Wait for health check to complete
-            await Task.Delay(100);
+            try
+            {
+                // Act — drive the check synchronously instead of racing Start()'s background task.
+                await service.GetCacheVersionAsync();
 
-            // Assert
-            Assert.That(service.IsHealthy, Is.False);
-            Assert.That(service.CacheVersion, Is.EqualTo("test123")); // Should still parse cache version
+                // Assert
+                Assert.That(service.IsHealthy, Is.False);
+                Assert.That(service.CacheVersion, Is.EqualTo("test123")); // Should still parse cache version
+            }
+            finally
+            {
+                service.Dispose();
+            }
         }
 
         [Test]

src/SchematicHQ.Client/RulesEngine/FlagCheck.cs

@@ -177,7 +177,9 @@ public static async Task<CheckFlagResult> CheckFlag(
                 .ToList();
 
             var ruleChecker = RuleCheckService.NewRuleCheckService();
-            foreach (var group in GroupRulesByPriority(flag.Rules.ToList(), companyRules, userRules))
+            // The wire format may send `"rules": null` for flags with no rules; treat that as empty.
+            var flagRules = flag.Rules?.ToList() ?? new List<RulesengineRule>();
+            foreach (var group in GroupRulesByPriority(flagRules, companyRules, userRules))
             {
                 foreach (var rule in group)
                 {