Implement a function to retrieve all tiles of a country together with their completeness
The Finalizer uses a query to retrieve the Quadkeys of all tiles with built area of a country together with the completeness status of the tiles. This query uses the tile_best_estimate view and is prone to run out of memory for large tiles. Therefore, this query should be implemented as a function in exposure-lib that can either operate directly for small countries or in batches for large countries to keep the memory demand low.