[AZ-284] Autodev baseline + testability refactor

Phase A baseline outputs from /autodev (Steps 1-5):
- Problem & solution docs (_docs/00_problem, _docs/01_solution)
- Codebase documentation (_docs/02_document) incl. architecture,
  module-layout, glossary, system-flows, baseline compliance scan
- Test specs (blackbox, performance, resilience, security, resource,
  traceability matrix)
- Test task decomposition (_docs/02_tasks/todo): AZ-285..AZ-290
- Testability refactor (_docs/04_refactoring/01-testability-refactoring):
  - TC-01 Move DownloadedTileInfoV2 + new ExistingTileInfo to Common.DTO
  - TC-02 Replace dead ISatelliteDownloader API with real signatures
  - TC-03 GoogleMapsDownloaderV2 implements ISatelliteDownloader
  - TC-04 TileService depends on ISatelliteDownloader (mockable)
  - TC-05 DI + endpoints use ISatelliteDownloader
- Test runner scripts (scripts/run-tests.sh, run-performance-tests.sh)
- Autodev state pointer (_docs/_autodev_state.md)

Prepares the codebase for AZ-285..AZ-290 unit/integration test work.

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

_docs/02_tasks/todo/AZ-288_route_service_tests.md

@@ -0,0 +1,30 @@
+# Unit Tests: RouteService
+
+**Task**: AZ-288_route_service_tests
+**Name**: Unit tests: RouteService (interpolation, geofence, distance)
+**Complexity**: 3 points
+**Dependencies**: AZ-285
+**Component**: Blackbox Tests
+**Tracker**: AZ-288
+**Epic**: AZ-284
+
+## Scenarios
+
+- BT-06: Simple 2-point route — verify intermediate points at ≤200m spacing, point types correct
+- BT-07: Route retrieval — verify GET returns same route with all points
+- BT-10: Complex 10-point route — verify point distribution (1 first-original, 1 last-original, 8 intermediate)
+- BT-11: Geofenced route — verify geofence region creation
+- BT-12: Extended 20-point route — verify point distribution (1 first-original, 1 last-original, 18 intermediate)
+- BT-N03: Route with <2 points — verify validation error
+- BT-N04/N05: Invalid geofences — verify validation errors
+
+## Test Data
+
+Route points from test_coordinates.md (ROUTE-01 through ROUTE-06)
+
+## Acceptance Criteria
+
+AC-1: Point interpolation produces spacing ≤200m between all consecutive points
+AC-2: Point type assignment is correct (original/intermediate)
+AC-3: Total distance is calculated via Haversine
+AC-4: Negative cases return appropriate errors