[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>

_docs/02_tasks/_dependencies_table.md

@@ -43,7 +43,7 @@ Roadmap: `_docs/04_refactoring/03-code-quality-refactoring/analysis/refactoring_
 | AZ-377 | C24 | Consolidate Earth constants + 111000 | 3 | AZ-371 | 2 | To Do |
 | AZ-368 | C15 | Shared TileCsvWriter | 3 | — | 2 | To Do |
 | AZ-367 | C14 | Shared TileGridStitcher | 3 | AZ-364 | 3 | To Do |
-| AZ-369 | C16 | Move inline DTOs out of Program.cs | 3 | — | 2 | To Do |
+| AZ-369 | C16 | Move inline DTOs out of Program.cs | 3 | — | 2 | Done (In Testing) |
 | AZ-365 | C12 | Decompose RouteService.CreateRouteAsync | 3 | — | 5 | To Do |
 | AZ-364 | C11 | Decompose RouteProcessingService god-class | 3 | AZ-366, AZ-367 (folds in AZ-360) | 5 | To Do |
 | AZ-360 | C08 | Replace IServiceProvider in RouteProcessingService | 3 | AZ-364 (folded) | 2 | To Do |