[AZ-369] Refactor C16: move inline DTOs out of Program.cs

Move 5 cross-component DTOs (GetSatelliteTilesResponse, SatelliteTile,
SaveResult, DownloadTileResponse, RequestRegionRequest) to
SatelliteProvider.Common/DTO/. Keep UploadImageRequest in the API
project under SatelliteProvider.Api.DTOs (IFormFile depends on
Microsoft.AspNetCore.Http; pulling it into Common would force an
ASP.NET framework reference into the foundation layer and break the
module-layout "Common: Imports from: (none)" invariant). Move
ParameterDescriptionFilter to SatelliteProvider.Api.Swagger.

Program.cs shrinks from 366 to 257 lines and now contains only
endpoint wiring (AC-1). JSON wire shape and Swagger schema names are
preserved (AC-2). 84 unit + full integration suite green (AC-3).

Co-authored-by: Cursor <cursoragent@cursor.com>

SatelliteProvider.Common/DTO/DownloadTileResponse.cs

@@ -0,0 +1,17 @@
+namespace SatelliteProvider.Common.DTO;
+
+public record DownloadTileResponse
+{
+    public Guid Id { get; set; }
+    public int ZoomLevel { get; set; }
+    public double Latitude { get; set; }
+    public double Longitude { get; set; }
+    public double TileSizeMeters { get; set; }
+    public int TileSizePixels { get; set; }
+    public string ImageType { get; set; } = string.Empty;
+    public string? MapsVersion { get; set; }
+    public int? Version { get; set; }
+    public string FilePath { get; set; } = string.Empty;
+    public DateTime CreatedAt { get; set; }
+    public DateTime UpdatedAt { get; set; }
+}

SatelliteProvider.Common/DTO/GetSatelliteTilesResponse.cs

@@ -0,0 +1,6 @@
+namespace SatelliteProvider.Common.DTO;
+
+public record GetSatelliteTilesResponse
+{
+    public List<SatelliteTile> Tiles { get; set; } = new();
+}

SatelliteProvider.Common/DTO/RequestRegionRequest.cs

@@ -0,0 +1,23 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace SatelliteProvider.Common.DTO;
+
+public record RequestRegionRequest
+{
+    [Required]
+    public Guid Id { get; set; }
+
+    [Required]
+    public double Latitude { get; set; }
+
+    [Required]
+    public double Longitude { get; set; }
+
+    [Required]
+    public double SizeMeters { get; set; }
+
+    [Required]
+    public int ZoomLevel { get; set; } = 18;
+
+    public bool StitchTiles { get; set; } = false;
+}

SatelliteProvider.Common/DTO/SatelliteTile.cs

@@ -0,0 +1,10 @@
+namespace SatelliteProvider.Common.DTO;
+
+public record SatelliteTile
+{
+    public string TileId { get; set; } = string.Empty;
+    public byte[] ImageData { get; set; } = Array.Empty<byte>();
+    public double Lat { get; set; }
+    public double Lon { get; set; }
+    public int ZoomLevel { get; set; }
+}

SatelliteProvider.Common/DTO/SaveResult.cs

@@ -0,0 +1,7 @@
+namespace SatelliteProvider.Common.DTO;
+
+public record SaveResult
+{
+    public bool Success { get; set; }
+    public string? Exception { get; set; }
+}