Andrew Charlwood 6d68b5eaa5 feat: add SNOMED mapping loader script (Task 1.2) ...

- Create data_processing/load_snomed_mapping.py with:
  - migrate_drug_snomed_mapping() for CSV to SQLite migration
  - get_drug_snomed_mapping_counts() for statistics
  - verify_drug_snomed_mapping_migration() for validation
  - clean_snomed_code() to remove trailing .0 from SNOMED codes
  - CLI interface: python -m data_processing.load_snomed_mapping

- Loaded 144,056 mappings from enriched CSV:
  - 707 unique drugs
  - 187 unique search terms
  - 21,265 unique SNOMED codes

2026-02-05 14:10:36 +00:00

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