test(protocol): parametrize temporal feature validator tests + float literals

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/unit/test_protocol_validator.py

@@ -153,14 +153,14 @@ def test_feature_unknown_column_fails() -> None:
         validate_strategy(ast)
 
 
-def test_validator_accepts_temporal_features() -> None:
-    for name in ("hour", "dow", "is_weekend", "minute_of_hour"):
+@pytest.mark.parametrize("name", ["hour", "dow", "is_weekend", "minute_of_hour"])
+def test_validator_accepts_temporal_feature(name: str) -> None:
     src = _wrap(
         {
             "op": "gt",
             "args": [
                 {"kind": "feature", "name": name},
-                    {"kind": "literal", "value": 0},
+                {"kind": "literal", "value": 0.0},
             ],
         }
     )
@@ -174,7 +174,7 @@ def test_validator_rejects_temporal_typo() -> None:
             "op": "gt",
             "args": [
                 {"kind": "feature", "name": "weekday"},
-                {"kind": "literal", "value": 0},
+                {"kind": "literal", "value": 0.0},
             ],
         }
     )