feat: add startup config validation and document ConfigManager pipeline editor

Add ConfigurationValidationRunner with IConfigurationValidator interface for
validating required settings at startup. Includes SecureStore and LDAP validators.
Expand ConfigManager with pipeline editing UI, dialogs, and step editors.
Update documentation with config validation guidance.

NEW/src/JdeScoping.Core/Models/Infrastructure/DataUpdate.cs

@@ -51,4 +51,9 @@ public class DataUpdate
     /// Number of records in update
     /// </summary>
     public long NumberRecords { get; set; }
+
+    /// <summary>
+    /// JSON string of parameters used during the sync operation (key:value pairs).
+    /// </summary>
+    public string? Parameters { get; set; }
 }