Cologne-Geomorphological-Software-Lab/CGDB: Implemented Dagster Boilerplate

Features Added Dagster integration for data orchestration Sample assets for extraction, validation, and OLAP transformation Django ORM integration for direct database access Ready-to-extend boilerplate for scientific data processing Security Improvements Enhanced file upload validation (extension, size, integrity checks) Added global file upload limits (100MB, configurable per form) Improved SECRET_KEY handling with example implementation Fixed circular import in unfold_settings Replaced print statements with proper logging Optimisations Improved code documentation Better structured dependency groups