rust-data-processing 0.3.4

Schema-first ingestion (CSV, JSON, Parquet, Excel) into an in-memory DataSet, plus Polars-backed pipelines, SQL, profiling, validation, and map/reduce-style processing.
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# Copy to .env and adjust if needed.
# ConnectorX URL (matches docs/CONNECTORS.md placeholder shape):
#   postgresql://etl_user:rdp_test_etl@localhost:5432/rdp_test?cxprotocol=binary

POSTGRES_PORT=5432
POSTGRES_APP_USER=etl_user
POSTGRES_APP_PASSWORD=rdp_test_etl
POSTGRES_DB=rdp_test

# Used by run_tests.py:
POSTGRES_CONNECT_URL=postgresql://etl_user:rdp_test_etl@localhost:5432/rdp_test?cxprotocol=binary