feat(delmia-notifier): config loader + SCADABRIDGE_API_KEY resolution

src/ZB.MOM.WW.ScadaBridge.DelmiaNotifier/NotifierConfig.cs

@@ -0,0 +1,19 @@
+namespace ZB.MOM.WW.ScadaBridge.DelmiaNotifier;
+
+/// <summary>Root of <c>appsettings.json</c>; mirrors the <c>ScadaBridge</c> section only.</summary>
+internal sealed class NotifierConfig
+{
+    public ScadaBridgeSection ScadaBridge { get; set; } = new();
+}
+
+internal sealed class ScadaBridgeSection
+{
+    /// <summary>Comma-separated failover list of base URLs (the method path is appended by the app).</summary>
+    public string? BaseUrls { get; set; }
+
+    /// <summary>Per-attempt HTTP timeout in seconds.</summary>
+    public int TimeoutSeconds { get; set; } = 30;
+
+    /// <summary>Optional diagnostic log file (relative to the exe); null/omitted → stderr only.</summary>
+    public string? LogPath { get; set; }
+}