Worked on the nautilus_trader repository to address a critical issue in ParquetDataCatalog’s data consolidation process. Focused on refining the consolidation logic by implementing timestamp-based deletion boundaries, which ensures deterministic and correct file retention during period-based archival operations. Emphasized idempotency and robust edge-case handling by expanding unit test coverage, thereby reducing the risk of data loss and improving the reliability of the data lifecycle. Utilized Python for both development and testing, applying skills in data management and data processing to align consolidation logic with recent pairwise merge improvements and enhance long-term maintainability and stability of the codebase.