[AZ-312] [AZ-313] [AZ-314] Split Services into per-component csprojs

Phase B of architecture coupling refactor (epic AZ-309). Replaces
the monolithic SatelliteProvider.Services with three per-component
csprojs to add a compiler-enforced module boundary (resolves F4):

- SatelliteProvider.Services.TileDownloader
- SatelliteProvider.Services.RegionProcessing
- SatelliteProvider.Services.RouteManagement

DI registrations relocated into per-component AddTileDownloader /
AddRegionProcessing / AddRouteManagement extension methods called
from Program.cs. RateLimitException moved to Common/Exceptions/ to
keep the three new csprojs as siblings (no Region->TileDownloader
ProjectReference). Dockerfiles and consumer csprojs (Api, Tests)
rewired to the new project paths. No DI lifetime or hosted-service
order changes.

Build: 0 warn, 0 err. Unit tests: 40/40. Smoke integration: green.
Co-authored-by: Cursor <cursoragent@cursor.com>

SatelliteProvider.Services.RegionProcessing/RegionProcessingServiceCollectionExtensions.cs

@@ -0,0 +1,24 @@
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+using SatelliteProvider.Common.Configs;
+using SatelliteProvider.Common.Interfaces;
+
+namespace SatelliteProvider.Services.RegionProcessing;
+
+public static class RegionProcessingServiceCollectionExtensions
+{
+    public static IServiceCollection AddRegionProcessing(this IServiceCollection services)
+    {
+        services.AddSingleton<IRegionRequestQueue>(sp =>
+        {
+            var processingConfig = sp.GetRequiredService<IOptions<ProcessingConfig>>().Value;
+            var logger = sp.GetRequiredService<ILogger<RegionRequestQueue>>();
+            return new RegionRequestQueue(processingConfig.QueueCapacity, logger);
+        });
+        services.AddSingleton<IRegionService, RegionService>();
+        services.AddHostedService<RegionProcessingService>();
+        return services;
+    }
+}