Organize Isaac's clinical files from the dropbasket folder into a structured hierarchy. Use this skill when the user asks to "organize files", "sort the dropbasket", "file the clinical documents", or similar requests about organizing Isaac's medical/clinical documentation. The skill uses parallel sub-agents to categorize files, tracks file hashes to detect duplicates, and maintains an inventory of processed files. This is Stage 1 of the 3-stage Isaac Clinical Document Pipeline.