bprashanth/dlt

AI Summary: Implement an incremental mode for the maps offloader to avoid redundant uploads. The new mode should compare existing output_tile_metadata (if available) with the input files and only upload files not already present in the metadata.

AI Summary: Modify the `tile_stitcher.py` script to remove its implicit reliance on the `images/` subdirectory within the `input_tile_dir`. The script should instead directly accept `input_tile_dir` as a parameter, eliminating the need for the script to search in both `output_tile_dir` and `input_tile_dir/images` for input tiles.