refactor: relocate options classes to dedicated Options folders

Move configuration options from Core/DataAccess/DataSync/ExcelIO to
dedicated Options folders within each project for better organization.
Update all references and tests accordingly.

NEW/src/JdeScoping.Infrastructure/Auth/LdapAuthService.cs

@@ -2,7 +2,7 @@ using System.DirectoryServices.Protocols;
 using System.Net;
 using JdeScoping.Core.Interfaces;
 using JdeScoping.Core.Models;
-using JdeScoping.Core.Options;
+using JdeScoping.Infrastructure.Options;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 
@@ -16,16 +16,13 @@ public sealed class LdapAuthService : IAuthService
     private const string LdapLookupFormat = "(sAMAccountName={0})";
 
     private readonly LdapOptions _options;
-    private readonly AuthOptions _authOptions;
     private readonly ILogger<LdapAuthService> _logger;
 
     public LdapAuthService(
         IOptions<LdapOptions> options,
-        IOptions<AuthOptions> authOptions,
         ILogger<LdapAuthService> logger)
     {
         _options = options.Value;
-        _authOptions = authOptions.Value;
         _logger = logger;
     }
 
@@ -41,7 +38,7 @@ public sealed class LdapAuthService : IAuthService
         }
 
         // Check if user is in admin bypass list
-        var isAdminBypass = _authOptions.AdminBypassUsers
+        var isAdminBypass = _options.AdminBypassUsers
             .Any(u => string.Equals(u, username, StringComparison.OrdinalIgnoreCase));
 
         // Try each configured LDAP server

NEW/src/JdeScoping.Infrastructure/Options/DataSourceOptions.cs

@@ -0,0 +1,22 @@
+namespace JdeScoping.Infrastructure.Options;
+
+/// <summary>
+/// Configuration options for data source selection (Oracle vs file-based).
+/// </summary>
+public class DataSourceOptions
+{
+    /// <summary>
+    /// Configuration section name in appsettings.json.
+    /// </summary>
+    public const string SectionName = "DataSource";
+
+    /// <summary>
+    /// Use file-based data sources instead of Oracle for development.
+    /// </summary>
+    public bool UseFileDataSource { get; set; } = false;
+
+    /// <summary>
+    /// Directory containing JSON data files for file-based data source.
+    /// </summary>
+    public string FileDirectory { get; set; } = "DevData";
+}

NEW/src/JdeScoping.Infrastructure/Options/LdapOptions.cs

@@ -0,0 +1,47 @@
+namespace JdeScoping.Infrastructure.Options;
+
+/// <summary>
+/// LDAP configuration options for authentication
+/// </summary>
+public class LdapOptions
+{
+    /// <summary>
+    /// Configuration section name
+    /// </summary>
+    public const string SectionName = "Ldap";
+
+    /// <summary>
+    /// LDAP server URLs (supports multiple for failover).
+    /// Example: ["ldap.corp.example.com", "ldap2.corp.example.com"]
+    /// </summary>
+    public string[] ServerUrls { get; set; } = [];
+
+    /// <summary>
+    /// Distinguished name of required group for access.
+    /// Example: "CN=ScopingTool-Users,OU=Groups,DC=corp,DC=example,DC=com"
+    /// </summary>
+    public string GroupDn { get; set; } = string.Empty;
+
+    /// <summary>
+    /// LDAP search base for user lookups.
+    /// Example: "DC=corp,DC=example,DC=com"
+    /// </summary>
+    public string SearchBase { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Connection timeout in seconds.
+    /// </summary>
+    public int ConnectionTimeoutSeconds { get; set; } = 30;
+
+    /// <summary>
+    /// Enable fake authentication for development.
+    /// When true, any credentials are accepted.
+    /// </summary>
+    public bool UseFakeAuth { get; set; } = false;
+
+    /// <summary>
+    /// Optional list of usernames that bypass group check.
+    /// Use sparingly for admin/testing purposes.
+    /// </summary>
+    public string[] AdminBypassUsers { get; set; } = [];
+}

NEW/src/JdeScoping.Infrastructure/Sources/Cms/CmsFileDataSource.cs

@@ -3,7 +3,7 @@ using System.Text.Json;
 using JdeScoping.Core.Interfaces;
 using JdeScoping.Core.Models;
 using JdeScoping.Core.Models.Quality;
-using JdeScoping.Core.Options;
+using JdeScoping.Infrastructure.Options;
 using Microsoft.Extensions.Options;
 
 namespace JdeScoping.Infrastructure.Sources.Cms;

NEW/src/JdeScoping.Infrastructure/Sources/Jde/JdeFileDataSource.cs

@@ -5,7 +5,7 @@ using JdeScoping.Core.Models;
 using JdeScoping.Core.Models.Inventory;
 using JdeScoping.Core.Models.Organization;
 using JdeScoping.Core.Models.WorkOrders;
-using JdeScoping.Core.Options;
+using JdeScoping.Infrastructure.Options;
 using Microsoft.Extensions.Options;
 
 namespace JdeScoping.Infrastructure.Sources.Jde;