Restructure solution layout by module

src/Notify/StellaOps.Notify.Worker/NotifyWorkerOptions.cs

@@ -0,0 +1,52 @@
+using System;
+
+namespace StellaOps.Notify.Worker;
+
+public sealed class NotifyWorkerOptions
+{
+    /// <summary>
+    /// Worker identifier prefix; defaults to machine name.
+    /// </summary>
+    public string? WorkerId { get; set; }
+
+    /// <summary>
+    /// Number of messages to lease per iteration.
+    /// </summary>
+    public int LeaseBatchSize { get; set; } = 16;
+
+    /// <summary>
+    /// Duration a lease remains active before it becomes eligible for claim.
+    /// </summary>
+    public TimeSpan LeaseDuration { get; set; } = TimeSpan.FromSeconds(30);
+
+    /// <summary>
+    /// Delay applied when no work is available.
+    /// </summary>
+    public TimeSpan IdleDelay { get; set; } = TimeSpan.FromMilliseconds(250);
+
+    /// <summary>
+    /// Maximum number of event leases processed concurrently.
+    /// </summary>
+    public int MaxConcurrency { get; set; } = 4;
+
+    /// <summary>
+    /// Maximum number of consecutive failures before the worker delays.
+    /// </summary>
+    public int FailureBackoffThreshold { get; set; } = 3;
+
+    /// <summary>
+    /// Delay applied when the failure threshold is reached.
+    /// </summary>
+    public TimeSpan FailureBackoffDelay { get; set; } = TimeSpan.FromSeconds(5);
+
+    internal string ResolveWorkerId()
+    {
+        if (!string.IsNullOrWhiteSpace(WorkerId))
+        {
+            return WorkerId!;
+        }
+
+        var host = Environment.MachineName;
+        return $"{host}-{Guid.NewGuid():n}";
+    }
+}