feat(auditlog): add AuditLogOptions + validator (#23)

src/ScadaLink.AuditLog/Configuration/PerTargetRedactionOverride.cs

@@ -0,0 +1,17 @@
+namespace ScadaLink.AuditLog.Configuration;
+
+/// <summary>
+/// Per-target redaction override applied additively on top of
+/// <see cref="AuditLogOptions.GlobalBodyRedactors"/> and the
+/// <see cref="AuditLogOptions.DefaultCapBytes"/> / <see cref="AuditLogOptions.ErrorCapBytes"/>
+/// caps. Targets are identified by the script-facing external-system /
+/// database / notification-list / inbound-API-key name.
+/// </summary>
+public sealed class PerTargetRedactionOverride
+{
+    /// <summary>Optional payload cap override (bytes); null inherits the global cap.</summary>
+    public int? CapBytes { get; set; }
+
+    /// <summary>Additional body redactor regex patterns (appended to the global list).</summary>
+    public List<string>? AdditionalBodyRedactors { get; set; }
+}