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Oleksandr Bezdieniezhnykh
687d6bdd5b
Add per-source tile rows to support multi-provider imagery (Google Maps + future UAV). Migration 013 (transactional) introduces source/captured_at columns, backfills existing rows to (source='google_maps', captured_at=created_at), and replaces the 4-column unique index with a 5-column index that includes source. TileRepository: - ColumnList includes source + captured_at - GetByTileCoordinatesAsync returns most-recent row across sources (ORDER BY captured_at DESC, updated_at DESC, id DESC) - GetTilesByRegionAsync uses DISTINCT ON to pick the most-recent tile per cell, restoring caller-facing row order - Insert/Update upsert on the new 5-column conflict key TileSource enum lives in Common.Enums. Snake_case wire format (google_maps, uav) is enforced by a focused TileSourceTypeHandler because the generic ToLowerInvariant pattern would emit "googlemaps", violating contract v1.0.0. TileService stamps Source=GoogleMaps + CapturedAt=UtcNow on every new tile. Tile-storage contract is now frozen at v1.0.0. AC coverage 7/7. New unit + integration tests cover all ACs; existing 200 unit + 5 smoke tests preserved. Co-authored-by: Cursor <cursoragent@cursor.com>