LS Keeper Data Bridge — ETL pipeline

Supplier files → S3 artefacts → a SQLite read model. Illustrative animation; stage names match the code.
The ETL pipeline of the LS Keeper Data Bridge An import run discovers files in the supplier's bucket, decrypts, normalises and optimises them to Parquet, merges each dataset into a snapshot, loads all snapshots into one DuckDB staging database, and publishes a SQLite read model.
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