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.DataAccess/Options/DataAccessOptions.cs

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+namespace JdeScoping.DataAccess.Options;
+
+/// <summary>
+/// Configuration options for the data access layer.
+/// </summary>
+public class DataAccessOptions
+{
+    /// <summary>
+    /// Configuration section name for binding.
+    /// </summary>
+    public const string SectionName = "DataAccess";
+
+    /// <summary>
+    /// Default timeout for database queries in seconds.
+    /// </summary>
+    public int DefaultTimeoutSeconds { get; set; } = 600;
+
+    /// <summary>
+    /// Timeout for lot usage queries in seconds (very large dataset).
+    /// </summary>
+    public int LotUsageTimeoutSeconds { get; set; } = 999999;
+
+    /// <summary>
+    /// Timeout for MIS data queries in seconds.
+    /// </summary>
+    public int MisDataTimeoutSeconds { get; set; } = 60000;
+
+    /// <summary>
+    /// Timeout for index rebuild operations in seconds.
+    /// </summary>
+    public int RebuildIndexTimeoutSeconds { get; set; } = 600;
+
+    /// <summary>
+    /// JDE production schema name (e.g., PRODDTA).
+    /// </summary>
+    public string ProductionSchema { get; set; } = "PRODDTA";
+
+    /// <summary>
+    /// JDE archive schema name (e.g., ARCDTAPD).
+    /// </summary>
+    public string ArchiveSchema { get; set; } = "ARCDTAPD";
+
+    /// <summary>
+    /// JDE stage schema name (e.g., JDESTAGE).
+    /// </summary>
+    public string StageSchema { get; set; } = "JDESTAGE";
+
+    /// <summary>
+    /// Enable detailed SQL logging for debugging.
+    /// </summary>
+    public bool EnableDetailedLogging { get; set; } = false;
+}

NEW/src/JdeScoping.DataAccess/Options/SearchOptions.cs

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+namespace JdeScoping.DataAccess.Options;
+
+/// <summary>
+/// Configuration options for search operations.
+/// </summary>
+public class SearchOptions
+{
+    /// <summary>
+    /// Configuration section name in appsettings.json.
+    /// </summary>
+    public const string SectionName = "Search";
+
+    /// <summary>
+    /// Maximum number of result rows to return.
+    /// </summary>
+    public int MaxResultRows { get; set; } = 100000;
+
+    /// <summary>
+    /// Search query timeout in seconds.
+    /// </summary>
+    public int TimeoutSeconds { get; set; } = 300;
+
+    /// <summary>
+    /// Maximum number of concurrent search operations.
+    /// </summary>
+    public int MaxConcurrentSearches { get; set; } = 5;
+}

NEW/src/JdeScoping.DataAccess/Options/SearchProcessingConfiguration.cs

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+namespace JdeScoping.DataAccess.Options;
+
+/// <summary>
+/// Configuration options for search processing.
+/// </summary>
+public class SearchProcessingConfiguration
+{
+    /// <summary>
+    /// Configuration section name in appsettings.json.
+    /// </summary>
+    public const string SectionName = "SearchProcessing";
+
+    /// <summary>
+    /// Query timeout in seconds for search execution.
+    /// </summary>
+    public int QueryTimeoutSeconds { get; set; } = 600;
+
+    /// <summary>
+    /// Maximum downstream traversal iterations.
+    /// </summary>
+    public int MaxTraversalIterations { get; set; } = 20;
+
+    /// <summary>
+    /// Enable debug SQL logging.
+    /// </summary>
+    public bool EnableDebugSql { get; set; } = false;
+
+    /// <summary>
+    /// Path to write debug SQL files (when EnableDebugSql is true).
+    /// </summary>
+    public string? DebugSqlPath { get; set; }
+}

NEW/src/JdeScoping.DataAccess/Options/SearchProcessingOptions.cs

@@ -0,0 +1,27 @@
+namespace JdeScoping.DataAccess.Options;
+
+/// <summary>
+/// Configuration options for search processing background service.
+/// </summary>
+public class SearchProcessingOptions
+{
+    /// <summary>
+    /// Configuration section name in appsettings.json.
+    /// </summary>
+    public const string SectionName = "SearchProcessing";
+
+    /// <summary>
+    /// Interval in seconds between polling for new search requests.
+    /// </summary>
+    public int PollingIntervalSeconds { get; set; } = 5;
+
+    /// <summary>
+    /// Maximum number of concurrent search operations.
+    /// </summary>
+    public int MaxConcurrentSearches { get; set; } = 2;
+
+    /// <summary>
+    /// Search operation timeout in minutes.
+    /// </summary>
+    public int SearchTimeoutMinutes { get; set; } = 30;
+}