Fix verification database permissions

api/alembic/versions/0038_grant_fn_requirement_kind_lookup.py

@@ -0,0 +1,69 @@
+"""grant Functions role requirement kind lookup
+
+Revision ID: 0038_grant_fn_requirement_kind_lookup
+Revises: 0037_validate_typed_submitted_value_constraints
+Create Date: 2026-05-26
+"""
+
+import os
+from collections.abc import Sequence
+
+from alembic import op
+
+revision: str = "0038_grant_fn_requirement_kind_lookup"
+down_revision: str | None = "0037_validate_typed_submitted_value_constraints"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+_REQUIRED_COLUMNS = "uuid, submission_value_kind"
+
+
+def upgrade() -> None:
+    role = _verification_functions_role()
+    if not role:
+        return
+
+    op.execute(
+        f"""
+        DO $$
+        BEGIN
+            IF EXISTS (SELECT 1 FROM pg_roles WHERE rolname = '{role}') THEN
+                GRANT SELECT ({_REQUIRED_COLUMNS})
+                ON requirements
+                TO "{role}";
+            END IF;
+        END $$;
+        """
+    )
+
+
+def downgrade() -> None:
+    role = _verification_functions_role()
+    if not role:
+        return
+
+    op.execute(
+        f"""
+        DO $$
+        BEGIN
+            IF EXISTS (SELECT 1 FROM pg_roles WHERE rolname = '{role}') THEN
+                REVOKE SELECT ({_REQUIRED_COLUMNS})
+                ON requirements
+                FROM "{role}";
+            END IF;
+        END $$;
+        """
+    )
+
+
+def _verification_functions_role() -> str | None:
+    role = os.environ.get("POSTGRES_VERIFICATION_FUNCTIONS_ROLE")
+    if not role:
+        return None
+    if not (role[0].isalpha() or role[0] == "_") or not all(
+        c.isalnum() or c == "_" for c in role
+    ):
+        raise RuntimeError(
+            f"POSTGRES_VERIFICATION_FUNCTIONS_ROLE is not a valid identifier: {role!r}"
+        )
+    return role