Part 4/15:
Data was structured following the Medallion architecture—raw data landing in the Bronze layer, then refined into Silver for cleaning and transformations, and finally aggregated in the Gold layer for analytics and reporting. This layered data lake was hosted on a cloud-based Delta Lake, ensuring high performance and reliability. Additional components included Databricks for transformation and modeling, databases (like Delta Lake and Cosmos DB) for data storage, and security tools such as Active Directory and Key Vault for authentication and security governance.