[AZ-1124] Add PT-10 gRPC stream perf scenario

Co-authored-by: Cursor <cursoragent@cursor.com>

SatelliteProvider.IntegrationTests/GrpcTestHelpers.cs

@@ -1,3 +1,5 @@
+using System.Net.Security;
+using System.Security.Cryptography.X509Certificates;
 using Grpc.Core;
 using Grpc.Net.Client;
 using Satellite.V1;
@@ -8,15 +10,65 @@ public static class GrpcTestHelpers
 {
     public static GrpcChannel CreateChannel(string apiUrl)
     {
+        var handler = new SocketsHttpHandler
+        {
+            EnableMultipleHttp2Connections = true,
+        };
+
+        var caCertPath = ResolveCaCertPath();
+        if (!string.IsNullOrEmpty(caCertPath))
+        {
+            var caCert = X509Certificate2.CreateFromPemFile(caCertPath);
+            handler.SslOptions = new SslClientAuthenticationOptions
+            {
+                RemoteCertificateValidationCallback = (_, certificate, _, errors) =>
+                {
+                    if (errors == SslPolicyErrors.None)
+                    {
+                        return true;
+                    }
+
+                    if (certificate is null)
+                    {
+                        return false;
+                    }
+
+                    using var chain = new X509Chain();
+                    chain.ChainPolicy.TrustMode = X509ChainTrustMode.CustomRootTrust;
+                    chain.ChainPolicy.CustomTrustStore.Add(caCert);
+                    chain.ChainPolicy.RevocationMode = X509RevocationMode.NoCheck;
+                    return chain.Build(new X509Certificate2(certificate));
+                },
+            };
+        }
+
         return GrpcChannel.ForAddress(apiUrl, new GrpcChannelOptions
         {
-            HttpHandler = new SocketsHttpHandler
-            {
-                EnableMultipleHttp2Connections = true,
-            },
+            HttpHandler = handler,
         });
     }
 
+    private static string? ResolveCaCertPath()
+    {
+        var explicitPath = Environment.GetEnvironmentVariable("PERF_CA_CERT");
+        if (!string.IsNullOrWhiteSpace(explicitPath) && File.Exists(explicitPath))
+        {
+            return explicitPath;
+        }
+
+        var projectRoot = Environment.GetEnvironmentVariable("PROJECT_ROOT");
+        if (!string.IsNullOrWhiteSpace(projectRoot))
+        {
+            var defaultPath = Path.Combine(projectRoot, "certs", "api.crt");
+            if (File.Exists(defaultPath))
+            {
+                return defaultPath;
+            }
+        }
+
+        return null;
+    }
+
     public static RouteTileDelivery.RouteTileDeliveryClient CreateClient(string apiUrl, string jwtToken)
     {
         var channel = CreateChannel(apiUrl);