[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>

_docs/03_implementation/batch_05_report.md

@@ -0,0 +1,69 @@
+# Batch Report
+
+**Batch**: 5 (refactor 02-coupling-refactoring · Phase B)
+**Tasks**: AZ-312, AZ-313, AZ-314
+**Date**: 2026-05-10
+
+## Task Results
+
+| Task | Status | Files Modified | Tests | AC Coverage | Issues |
+|------|--------|---------------|-------|-------------|--------|
+| AZ-312 Split Services into 3 csprojs | Done | 3 new csprojs + 7 source moves + sln + 2 Dockerfiles | 40/40 + smoke | 4/4 ACs | None |
+| AZ-313 Update consumer csprojs | Done | Api.csproj + Tests.csproj + 5 test usings | 40/40 + smoke | 3/3 ACs | None |
+| AZ-314 DI extension methods | Done | 3 new ServiceCollectionExtensions + Program.cs | 40/40 + smoke | 4/4 ACs | None |
+
+## Files Changed
+
+New:
+- `SatelliteProvider.Services.TileDownloader/SatelliteProvider.Services.TileDownloader.csproj`
+- `SatelliteProvider.Services.TileDownloader/TileDownloaderServiceCollectionExtensions.cs`
+- `SatelliteProvider.Services.RegionProcessing/SatelliteProvider.Services.RegionProcessing.csproj`
+- `SatelliteProvider.Services.RegionProcessing/RegionProcessingServiceCollectionExtensions.cs`
+- `SatelliteProvider.Services.RouteManagement/SatelliteProvider.Services.RouteManagement.csproj`
+- `SatelliteProvider.Services.RouteManagement/RouteManagementServiceCollectionExtensions.cs`
+- `SatelliteProvider.Common/Exceptions/RateLimitException.cs`
+
+Moved (with namespace updates):
+- `TileService.cs`, `GoogleMapsDownloaderV2.cs` → `SatelliteProvider.Services.TileDownloader/`
+- `RegionService.cs`, `RegionProcessingService.cs`, `RegionRequestQueue.cs` → `SatelliteProvider.Services.RegionProcessing/`
+- `RouteService.cs`, `RouteProcessingService.cs` → `SatelliteProvider.Services.RouteManagement/`
+
+Modified:
+- `SatelliteProvider.Api/Program.cs` (DI cleanup + namespace usings)
+- `SatelliteProvider.Api/SatelliteProvider.Api.csproj` (3 new ProjectReferences)
+- `SatelliteProvider.Api/Dockerfile` (COPY new csproj paths)
+- `SatelliteProvider.IntegrationTests/Dockerfile` (drop stale COPY of old Services csproj)
+- `SatelliteProvider.Tests/SatelliteProvider.Tests.csproj` (3 new ProjectReferences)
+- `SatelliteProvider.Tests/InfrastructureTests.cs`, `TileServiceTests.cs`, `RegionServiceTests.cs`, `RouteServiceTests.cs`, `RegionRequestQueueTests.cs` (using updates)
+- `SatelliteProvider.sln`
+
+Deleted:
+- `SatelliteProvider.Services/` directory (csproj + 7 source files moved out)
+
+## AC Test Coverage
+
+11 of 11 ACs across the 3 tasks covered. Build/test acceptance verified by `dotnet build` (0 warn, 0 err), 40/40 unit tests, and smoke integration suite passing end-to-end.
+
+## Code Review Verdict
+
+**PASS** — no findings. See `_docs/03_implementation/reviews/batch_05_review.md`.
+
+## Auto-Fix Attempts
+
+1 (in-batch): `RateLimitException` was originally defined in `GoogleMapsDownloaderV2.cs` (TileDownloader) and caught in `RegionService.cs` (RegionProcessing). After the split, this would have required a `RegionProcessing → TileDownloader` ProjectReference (cross-Layer-3 dependency). Resolved by relocating the exception to `SatelliteProvider.Common/Exceptions/`.
+
+## Build / Tests
+
+- `dotnet build SatelliteProvider.sln --configuration Release` → 0 warnings, 0 errors (47.98s)
+- `dotnet test SatelliteProvider.Tests` → 40/40 passed (1.93s)
+- `./scripts/run-tests.sh --smoke` → all integration tests pass end-to-end (~2 min)
+
+## Architecture-Baseline Impact
+
+- F4 (Medium — single Services csproj packs three components): **resolved** by project split. Compiler now enforces the layer-3 sibling boundary.
+- F3 (Medium — already resolved in Batch 4): no regression.
+- Documentation sync (`module-layout.md`, `architecture.md`) deferred to AZ-315 (Batch 6).
+
+## Next Batch
+
+AZ-315 (Phase C — documentation sync: update `architecture.md` and `module-layout.md` to reflect the split, then close epic AZ-309).