Retail ETL Medallion Pipeline Skill Skill by ara.so — Data Skills collection. Overview This project implements a production-grade Medallion Architecture ETL pipeline for retail/hypermarket data, handling complex business logic like inventory shrinkage, meat/poultry recipe conversions, supplier rebate tiers, and multi-branch sales consolidation. The architecture follows three data quality layers: - Bronze Layer : Raw data ingestion from CSV sources (sales, stock, products) - Silver Layer : Cleaned, standardized, and business-rule-applied data - Gold Layer : Aggregated, analytics-ready dimensio…