[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/00_problem/data_parameters.md

@@ -0,0 +1,91 @@
+# Data Parameters
+
+## Input Data
+
+### API Request: Single Tile Download
+
+| Parameter | Type | Required | Constraints | Description |
+|-----------|------|----------|-------------|-------------|
+| latitude | double | yes | -90 to 90 | Center latitude |
+| longitude | double | yes | -180 to 180 | Center longitude |
+| zoomLevel | int | yes | 1–20 | Google Maps zoom level |
+
+### API Request: Region
+
+| Parameter | Type | Required | Constraints | Description |
+|-----------|------|----------|-------------|-------------|
+| latitude | double | yes | -90 to 90 | Region center latitude |
+| longitude | double | yes | -180 to 180 | Region center longitude |
+| sizeMeters | double | yes | > 0 | Square region side length in meters |
+| zoomLevel | int | yes | 1–20 | Tile zoom level |
+| stitchTiles | bool | no | default: false | Whether to produce composite image |
+
+### API Request: Route Creation
+
+| Parameter | Type | Required | Constraints | Description |
+|-----------|------|----------|-------------|-------------|
+| id | UUID | yes | — | Client-generated route ID |
+| name | string | yes | max 200 chars | Human-readable route name |
+| description | string | no | — | Optional description |
+| regionSizeMeters | double | yes | > 0 | Size of region per route point |
+| zoomLevel | int | yes | 1–20 | Tile zoom level |
+| points | array | yes | ≥ 2 waypoints | Ordered route waypoints |
+| points[].lat | double | yes | -90 to 90 | Waypoint latitude |
+| points[].lon | double | yes | -180 to 180 | Waypoint longitude |
+| geofences | object | no | — | Optional geofence definitions |
+| geofences.polygons[] | array | no | — | Rectangle boundaries |
+| geofences.polygons[].northWest | GeoPoint | yes (if polygon) | valid lat/lon, non-zero | NW corner |
+| geofences.polygons[].southEast | GeoPoint | yes (if polygon) | valid lat/lon, non-zero | SE corner |
+| requestMaps | bool | no | default: false | Whether to download map tiles for route |
+| createTilesZip | bool | no | default: false | Whether to produce ZIP archive |
+
+## Output Data
+
+### Tile File
+
+- **Format**: JPEG
+- **Path**: `./tiles/{zoom}/{x}/{y}.jpg`
+- **Size**: ~50–100 KB per tile (typical at zoom 18)
+
+### Region Outputs
+
+| File | Format | Path Pattern | Content |
+|------|--------|-------------|---------|
+| CSV manifest | CSV | `./ready/region_{id}_ready.csv` | Tile coordinates and file paths |
+| Summary | TXT | `./ready/region_{id}_summary.txt` | Processing statistics |
+| Stitched image | JPEG | `./ready/region_{id}_stitched.jpg` | Composite tile image |
+
+### Route Outputs
+
+| File | Format | Path Pattern | Content |
+|------|--------|-------------|---------|
+| Stitched map | JPEG | `./ready/route_{id}_stitched.jpg` | Full route composite with markers |
+| Tiles ZIP | ZIP | `./ready/route_{id}_tiles.zip` | All tiles (max 50 MB) |
+| CSV | CSV | `./ready/route_{id}_ready.csv` | Tile manifest |
+| Summary | TXT | `./ready/route_{id}_summary.txt` | Route processing statistics |
+
+## Configuration Parameters
+
+### MapConfig (provider-specific; e.g., Google Maps — each provider has its own config section)
+
+| Parameter | Type | Default | Description |
+|-----------|------|---------|-------------|
+| ApiKey | string | — | Provider authentication token |
+| TileSizePixels | int | 256 | Tile image dimension |
+| MaxZoomLevel | int | 20 | Maximum allowed zoom |
+| DefaultZoomLevel | int | 18 | Default when not specified |
+
+### StorageConfig
+
+| Parameter | Type | Default | Description |
+|-----------|------|---------|-------------|
+| TilesDirectory | string | "./tiles" | Root tile storage path |
+| ReadyDirectory | string | "./ready" | Output artifacts path |
+
+### ProcessingConfig
+
+| Parameter | Type | Default | Description |
+|-----------|------|---------|-------------|
+| MaxConcurrentDownloads | int | 4 | Parallel Google Maps requests |
+| MaxConcurrentRegions | int | 20 | Parallel region processing |
+| QueueCapacity | int | 1000 | Max pending region requests |