Add docker execution environment

RemoteExec.Shared/Models/TaskItem.cs

@@ -0,0 +1,17 @@
+namespace RemoteExec.Shared.Models;
+
+/// <summary>
+/// Represents a task item in the execution stream, combining a task ID with its execution request.
+/// </summary>
+public class TaskItem
+{
+    /// <summary>
+    /// Gets or sets the unique identifier for this task.
+    /// </summary>
+    public Guid TaskId { get; set; }
+
+    /// <summary>
+    /// Gets or sets the execution request details.
+    /// </summary>
+    public required RemoteExecutionRequest Request { get; set; }
+}