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.DataSync/Options/DataSourceConfig.cs

@@ -0,0 +1,78 @@
+namespace JdeScoping.DataSync.Options;
+
+/// <summary>
+/// Configuration for a single data source table sync.
+/// </summary>
+public class DataSourceConfig
+{
+    /// <summary>
+    /// Target table name in SQL Server cache.
+    /// </summary>
+    public required string TableName { get; set; }
+
+    /// <summary>
+    /// Source system: "JDE" or "CMS".
+    /// </summary>
+    public required string SourceSystem { get; set; }
+
+    /// <summary>
+    /// Source data identifier (e.g., "WORKORDER", "LOTUSAGE").
+    /// </summary>
+    public string SourceData { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Name of IDataFetcher implementation type (without generic suffix).
+    /// </summary>
+    public required string FetcherTypeName { get; set; }
+
+    /// <summary>
+    /// Optional IPostProcessor implementation type name.
+    /// </summary>
+    public string? PostProcessorTypeName { get; set; }
+
+    /// <summary>
+    /// Whether this data source is enabled for sync.
+    /// </summary>
+    public bool IsEnabled { get; set; } = true;
+
+    /// <summary>
+    /// Mass sync schedule configuration.
+    /// </summary>
+    public ScheduleConfig MassConfig { get; set; } = new();
+
+    /// <summary>
+    /// Daily incremental sync configuration.
+    /// </summary>
+    public ScheduleConfig DailyConfig { get; set; } = new();
+
+    /// <summary>
+    /// Hourly incremental sync configuration.
+    /// </summary>
+    public ScheduleConfig HourlyConfig { get; set; } = new();
+}
+
+/// <summary>
+/// Schedule configuration for a sync type (Mass/Daily/Hourly).
+/// </summary>
+public class ScheduleConfig
+{
+    /// <summary>
+    /// Whether this schedule is enabled.
+    /// </summary>
+    public bool Enabled { get; set; } = true;
+
+    /// <summary>
+    /// Interval in minutes between syncs.
+    /// </summary>
+    public int IntervalMinutes { get; set; }
+
+    /// <summary>
+    /// Whether to truncate the table before syncing (mass updates only).
+    /// </summary>
+    public bool PrepurgeData { get; set; } = false;
+
+    /// <summary>
+    /// Whether to rebuild indexes after syncing (mass updates only).
+    /// </summary>
+    public bool ReIndexData { get; set; } = false;
+}

NEW/src/JdeScoping.DataSync/Options/DataSyncOptions.cs

@@ -0,0 +1,65 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace JdeScoping.DataSync.Options;
+
+/// <summary>
+/// Configuration options for the data synchronization service.
+/// </summary>
+public class DataSyncOptions
+{
+    /// <summary>
+    /// Configuration section name in appsettings.json.
+    /// </summary>
+    public const string SectionName = "DataSync";
+
+    /// <summary>
+    /// Time between schedule checks (default: 1 minute).
+    /// </summary>
+    public TimeSpan CheckInterval { get; set; } = TimeSpan.FromMinutes(1);
+
+    /// <summary>
+    /// Maximum parallel sync operations (default: 8).
+    /// </summary>
+    [Range(1, 32)]
+    public int MaxDegreeOfParallelism { get; set; } = 8;
+
+    /// <summary>
+    /// Records per batch for streaming (default: 1,000,000).
+    /// </summary>
+    [Range(1000, 10_000_000)]
+    public int BatchSize { get; set; } = 1_000_000;
+
+    /// <summary>
+    /// Rows per bulk copy batch (default: 10,000).
+    /// </summary>
+    [Range(100, 100_000)]
+    public int BulkCopyBatchSize { get; set; } = 10_000;
+
+    /// <summary>
+    /// Multiplier for lookback window (default: 3).
+    /// </summary>
+    [Range(1, 10)]
+    public int LookbackMultiplier { get; set; } = 3;
+
+    /// <summary>
+    /// Days to retain DataUpdate history (default: 30).
+    /// </summary>
+    [Range(1, 365)]
+    public int PurgeRetentionDays { get; set; } = 30;
+
+    /// <summary>
+    /// Timeout in seconds for sync operations (default: 3600 = 1 hour).
+    /// </summary>
+    [Range(60, 86400)]
+    public int SyncTimeoutSeconds { get; set; } = 3600;
+
+    /// <summary>
+    /// Whether the data sync service is enabled (default: true).
+    /// </summary>
+    public bool Enabled { get; set; } = true;
+
+    /// <summary>
+    /// Per-table data source configurations.
+    /// </summary>
+    public List<DataSourceConfig> DataSources { get; set; } = [];
+}