- Stop writing "downloaded_YYYY-MM-DD" into tiles.maps_version: new rows
bind @MapsVersion to NULL via TileService.BuildTileEntity.
- Retain the tiles.maps_version column (coderule.mdc forbids unprompted
column drops); pre-existing rows keep their values for forensics.
- Remove MapsVersion property from DownloadTileResponse (API wire shape)
and TileMetadata (internal DTO); OpenAPI schema regenerates from the
DTO via Swashbuckle.
- Add 3 AC tests in TileServiceTests covering the captured-entity write
(AC-1) and the DTO/wire-shape removal (AC-2).
- Update integration-test local DTO + console output; refresh docs in
common_dtos.md, services_tile_service.md, data_model.md.
- Archive AZ-373 task file: todo/ -> done/.
174 unit + 5 smoke pass.
Co-authored-by: Cursor <cursoragent@cursor.com>