Update Raster IO

[czaloom]

Changes

• Raster pixel type changed from 8BUI (8-bit unsigned integer) to 1BB (1-bit integer).
• No longer using ST_AsPNG for Raster retrieval. This was an issue as hosted postgresql instances do not support this function.
• Object Detection benchmark now operates over 6 datums.

This did not seem to cause any performance benefits for small batch sizes.

before (main)

{
    "23/07/2024 18:14:12": {
        "number_of_datums": 6,
        "number_of_unique_labels": 28,
        "number_of_annotations": 142,
        "ingest_runtime": "28.2 seconds",
        "eval_runtime": "13.7 seconds",
        "del_runtime": "0.1 seconds"
    },
    "23/07/2024 18:14:55": {
        "number_of_datums": 6,
        "number_of_unique_labels": 28,
        "number_of_annotations": 142,
        "ingest_runtime": "28.7 seconds",
        "eval_runtime": "13.8 seconds",
        "del_runtime": "0.0 seconds"
    }
}

after (PR 679)

{
    "23/07/2024 18:05:44": {
        "number_of_datums": 6,
        "number_of_unique_labels": 28,
        "number_of_annotations": 142,
        "ingest_runtime": "29.6 seconds",
        "eval_runtime": "13.7 seconds",
        "del_runtime": "0.1 seconds"
    },
    "23/07/2024 18:06:28": {
        "number_of_datums": 6,
        "number_of_unique_labels": 28,
        "number_of_annotations": 142,
        "ingest_runtime": "29.3 seconds",
        "eval_runtime": "13.8 seconds",
        "del_runtime": "0.0 seconds"
    }
}