fix(ci): format import line for ruff compliance

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

Author: varun369

src/agentassert_abc/dsl/validator.py

@@ -16,7 +16,12 @@
 import re
 
 from agentassert_abc.dsl.models import ValidationError
-from agentassert_abc.models import ConstraintCheck, ContractSpec, GovernanceConstraint, SoftConstraint  # noqa: TCH001
+from agentassert_abc.models import (  # noqa: TCH001
+    ConstraintCheck,
+    ContractSpec,
+    GovernanceConstraint,
+    SoftConstraint,
+)
 
 _OPERATOR_FIELDS = (
     "equals", "not_equals", "gt", "gte", "lt", "lte",