refactor(products): remove usage notes and contraindications fields

backend/alembic/versions/8e4c1b7a9d2f_drop_usage_notes_and_contraindications_from_products.py

@@ -0,0 +1,37 @@
+"""drop_usage_notes_and_contraindications_from_products
+
+Revision ID: 8e4c1b7a9d2f
+Revises: f1a2b3c4d5e6
+Create Date: 2026-03-04 00:00:00.000000
+
+"""
+
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+
+from alembic import op
+
+revision: str = "8e4c1b7a9d2f"
+down_revision: Union[str, None] = "f1a2b3c4d5e6"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.drop_column("products", "contraindications")
+    op.drop_column("products", "usage_notes")
+
+
+def downgrade() -> None:
+    op.add_column(
+        "products",
+        sa.Column(
+            "contraindications",
+            sa.JSON(),
+            nullable=False,
+            server_default=sa.text("'[]'::json"),
+        ),
+    )
+    op.alter_column("products", "contraindications", server_default=None)
+    op.add_column("products", sa.Column("usage_notes", sa.String(), nullable=True))