Reject float timestamp coercion in session model

Co-authored-by: Shri Sukhani <shrisukhani@users.noreply.github.com>

Author: cursoragent

hyperbrowser/models/session.py

@@ -163,7 +163,9 @@ def parse_timestamp(cls, value: Optional[Union[str, int]]) -> Optional[int]:
                 ) from exc
         if isinstance(value, str):
             raise ValueError("timestamp string values must be plain strings")
-        return value
+        raise ValueError(
+            "timestamp values must be plain integers or plain numeric strings"
+        )
 
 
 class SessionDetail(Session):

tests/test_session_models.py

@@ -84,3 +84,14 @@ def test_session_model_rejects_non_integer_timestamp_strings():
         ValidationError, match="timestamp string values must be integer-formatted"
     ):
         Session.model_validate(payload)
+
+
+def test_session_model_rejects_float_timestamps():
+    payload = _build_session_payload()
+    payload["startTime"] = 1.0
+
+    with pytest.raises(
+        ValidationError,
+        match="timestamp values must be plain integers or plain numeric strings",
+    ):
+        Session.model_validate(payload)