Update src/temporal_data.py

Create feature_lookups.py

Create node_features.py

Create __init__.py

Create __init__.py

Rename src/build_geographical_edges.py to src/data_prep/build_geographical_edges.py

Rename src/build_lobbying_events.py to src/data_prep/build_lobbying_events.py

Rename src/build_campaign_events.py to src/data_prep/build_campaign_events.py

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