feat(migrations): new migration script to drop minor trace chemistry sample/analyte unique constraint

Author: ksmuczynski

alembic/versions/5336a52336df_drop_minor_trace_chemistry_unique_.py

@@ -0,0 +1,36 @@
+"""drop minor trace chemistry unique constraint
+
+Revision ID: 5336a52336df
+Revises: e71807682f57
+Create Date: 2026-02-18 14:22:00.874725
+
+"""
+
+from typing import Sequence, Union
+
+from alembic import op
+
+
+# revision identifiers, used by Alembic.
+revision: str = "5336a52336df"
+down_revision: Union[str, Sequence[str], None] = "e71807682f57"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    op.drop_constraint(
+        "uq_minor_trace_chemistry_sample_analyte",
+        "NMA_MinorTraceChemistry",
+        type_="unique",
+    )
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    op.create_unique_constraint(
+        "uq_minor_trace_chemistry_sample_analyte",
+        "NMA_MinorTraceChemistry",
+        ["chemistry_sample_info_id", "analyte"],
+    )