Initial import of the CBDDC codebase with docs and tests. Add a .NET-focused gitignore to keep generated artifacts out of source control.

src/ZB.MOM.WW.CBDDC.Core/Resilience/IRetryPolicy.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace ZB.MOM.WW.CBDDC.Core.Resilience
+{
+    public interface IRetryPolicy
+    {
+        /// <summary>
+        /// Executes an asynchronous operation with retry handling.
+        /// </summary>
+        /// <param name="operation">The operation to execute.</param>
+        /// <param name="operationName">The operation name used for diagnostics.</param>
+        /// <param name="cancellationToken">A token used to cancel the operation.</param>
+        /// <returns>A task that represents the asynchronous execution.</returns>
+        Task ExecuteAsync(Func<Task> operation, string operationName, CancellationToken cancellationToken = default);
+        /// <summary>
+        /// Executes an asynchronous operation with retry handling and returns a result.
+        /// </summary>
+        /// <typeparam name="T">The result type.</typeparam>
+        /// <param name="operation">The operation to execute.</param>
+        /// <param name="operationName">The operation name used for diagnostics.</param>
+        /// <param name="cancellationToken">A token used to cancel the operation.</param>
+        /// <returns>A task that represents the asynchronous execution and yields the operation result.</returns>
+        Task<T> ExecuteAsync<T>(Func<Task<T>> operation, string operationName, CancellationToken cancellationToken = default);
+    }
+}