Fix: correct down_revision in medicine type enum migration

Fix: Correct down_revision in Medicine Type Enum Migration

Summary

This MR fixes an incorrect down_revision reference in the add_ointment_powder_to_medicine_type_enum Alembic migration to restore a valid migration chain.

Closes #64 (closed)

Changes

• Updated down_revision from a8b9c0d1e2f3 → e4f5a6b7c8d9 in alembic/versions/add_ointment_powder_to_medicine_type_enum.py
• Updated the Revises field in the docstring to match

Testing

• Ran alembic upgrade head — migrations apply cleanly
• Ran alembic downgrade -1 — rollback works as expected
• Migration chain verified with alembic history

Type of Change

• Bug fix