rewrite to zmq push and pull patterns.

file load works, suite can start up

Azaion.CommonSecurity/Services/ResourceLoader.cs

@@ -1,4 +1,8 @@
 using Azaion.CommonSecurity.DTO;
+using Azaion.CommonSecurity.DTO.Commands;
+using MessagePack;
+using NetMQ;
+using NetMQ.Sockets;
 
 namespace Azaion.CommonSecurity.Services;
 
@@ -7,6 +11,40 @@ public interface IResourceLoader
     Task<MemoryStream> Load(string fileName, CancellationToken cancellationToken = default);
 }
 
+public class PythonResourceLoader : IResourceLoader
+{
+    private readonly PushSocket _pushSocket = new();
+    private readonly PullSocket _pullSocket = new();
+
+    public PythonResourceLoader(ApiCredentials credentials)
+    {
+        //Run python by credentials
+        _pushSocket.Connect($"tcp://{SecurityConstants.SOCKET_HOST}:{SecurityConstants.SOCKET_SEND_PORT}");
+        _pullSocket.Connect($"tcp://{SecurityConstants.SOCKET_HOST}:{SecurityConstants.SOCKET_RECEIVE_PORT}");
+    }
+
+    public async Task<MemoryStream> Load(string fileName, CancellationToken cancellationToken = default)
+    {
+        try
+        {
+            var b = MessagePackSerializer.Serialize(new FileCommand
+            {
+                CommandType = CommandType.Load,
+                Filename = fileName
+            });
+            _pushSocket.SendFrame(b);
+
+            var bytes = _pullSocket.ReceiveFrameBytes(out bool more);
+            return new MemoryStream(bytes);
+
+        }
+        catch (Exception ex)
+        {
+            throw new Exception($"Failed to load fil0e '{fileName}': {ex.Message}", ex);
+        }
+    }
+}
+
 public class ResourceLoader(AzaionApiClient api, ApiCredentials credentials) : IResourceLoader
 {
     public async Task<MemoryStream> Load(string fileName, CancellationToken cancellationToken = default)