feat(CUB-8): Create background service for Moonraker mapping

backend/Infrastructure/Configuration/MoonrakerPrinterSyncOptions.cs

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+namespace Extrudex.Infrastructure.Configuration;
+
+/// <summary>
+/// Configuration options for the MoonrakerPrinterSync background service.
+/// Bound from appsettings.json under the "MoonrakerPrinterSync" section.
+/// Controls polling interval, timeouts, and feature toggles for the
+/// printer status and print job mapping service.
+/// </summary>
+public class MoonrakerPrinterSyncOptions
+{
+    /// <summary>
+    /// The section name in appsettings.json where these options are bound.
+    /// </summary>
+    public const string SectionName = "MoonrakerPrinterSync";
+
+    /// <summary>
+    /// How often the background service polls Moonraker printers for status
+    /// and print job data. Default: 1 minute.
+    /// </summary>
+    public TimeSpan PollingInterval { get; set; } = TimeSpan.FromMinutes(1);
+
+    /// <summary>
+    /// Timeout for individual HTTP requests to a Moonraker printer.
+    /// Default: 15 seconds.
+    /// </summary>
+    public TimeSpan RequestTimeout { get; set; } = TimeSpan.FromSeconds(15);
+
+    /// <summary>
+    /// Whether the Moonraker printer sync service is enabled.
+    /// Set to false to disable without removing the service registration.
+    /// Default: true.
+    /// </summary>
+    public bool Enabled { get; set; } = true;
+
+    /// <summary>
+    /// Maximum number of print history items to fetch per printer per sync cycle.
+    /// Controls the batch size when syncing print jobs from Moonraker.
+    /// Default: 25.
+    /// </summary>
+    public int HistoryBatchSize { get; set; } = 25;
+}