first region implementation

SatelliteProvider.Common/DTO/RegionRequest.cs

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+namespace SatelliteProvider.Common.DTO;
+
+public class RegionRequest
+{
+    public Guid Id { get; set; }
+    public double Latitude { get; set; }
+    public double Longitude { get; set; }
+    public double SizeMeters { get; set; }
+    public int ZoomLevel { get; set; }
+}
+

SatelliteProvider.Common/DTO/RegionStatus.cs

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+namespace SatelliteProvider.Common.DTO;
+
+public class RegionStatus
+{
+    public Guid Id { get; set; }
+    public string Status { get; set; } = string.Empty;
+    public string? CsvFilePath { get; set; }
+    public string? SummaryFilePath { get; set; }
+    public int TilesDownloaded { get; set; }
+    public int TilesReused { get; set; }
+    public DateTime CreatedAt { get; set; }
+    public DateTime UpdatedAt { get; set; }
+}
+

SatelliteProvider.Common/Interfaces/IRegionRequestQueue.cs

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+using SatelliteProvider.Common.DTO;
+
+namespace SatelliteProvider.Common.Interfaces;
+
+public interface IRegionRequestQueue
+{
+    ValueTask EnqueueAsync(RegionRequest request, CancellationToken cancellationToken = default);
+    ValueTask<RegionRequest?> DequeueAsync(CancellationToken cancellationToken = default);
+    int Count { get; }
+}
+

SatelliteProvider.Common/Interfaces/IRegionService.cs

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+using SatelliteProvider.Common.DTO;
+
+namespace SatelliteProvider.Common.Interfaces;
+
+public interface IRegionService
+{
+    Task<RegionStatus> RequestRegionAsync(Guid id, double latitude, double longitude, double sizeMeters, int zoomLevel);
+    Task<RegionStatus?> GetRegionStatusAsync(Guid id);
+    Task ProcessRegionAsync(Guid id, CancellationToken cancellationToken = default);
+}
+