[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_document/state.json

@@ -0,0 +1,29 @@
+{
+  "current_step": "component-assembly",
+  "completed_steps": ["discovery", "module-analysis"],
+  "focus_dir": null,
+  "modules_total": 12,
+  "modules_documented": [
+    "common_configs",
+    "common_dtos",
+    "common_interfaces",
+    "common_geoutil",
+    "dataaccess_models",
+    "dataaccess_migrator",
+    "dataaccess_tile_repository",
+    "dataaccess_region_repository",
+    "dataaccess_route_repository",
+    "services_google_maps_downloader",
+    "services_tile_service",
+    "services_region",
+    "services_route",
+    "api_program",
+    "tests_unit",
+    "tests_integration"
+  ],
+  "modules_remaining": [],
+  "module_batch": 4,
+  "components_written": [],
+  "step_4_5_glossary_vision": "not_started",
+  "last_updated": "2026-05-10T00:30:00Z"
+}