Add an option to load ABP locally, or make it clearer in the docs

[dodgydave67]

Hi there, some departments/orgs prohibit use of APIs but still have ABP stored on locally/cloud/databricks.

There isn't a clear option (unless I'm missing something) to load ABP data without an API in the docs.

This is the way I did it, by creating a config.yaml file and editing the ukam_os_builder steps:

config.yaml:

source:
  type: abp

paths:
  work_dir: /dbfs/mnt/your_storage_folder/addressbase_working

os_downloads:
  package_id: "0"
  version_id: "0"

processing:
  num_chunks: 10
  duckdb_memory_limit: "16GB"

Code to run:

from ukam_os_builder.api.settings import load_settings
from ukam_os_builder.data_sources.abp.transform.runner import run_flatfile_step

settings = load_settings("config.yaml")
output_files = run_flatfile_step(settings, force=True)