Andrew Charlwood c93417f0e7 feat: return ALL GP matches with code_frequency in get_patient_indication_groups (Task 1.1) ...

- Replace QUALIFY ROW_NUMBER()=1 with GROUP BY + COUNT(*) to return all matching
  Search_Terms per patient instead of just the most recent
- Add earliest_hcd_date parameter to restrict GP codes to HCD data window
- Return code_frequency column (count of matching SNOMED codes per Search_Term)
  for use as tiebreaker in drug-aware indication matching
- Update empty DataFrame returns to match new column format

2026-02-05 23:01:01 +00:00

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