[bug] Comparing Constant.name with Constant

[HaoxianChen]

https://github.com/difflog-project/qd/blob/4af7366e1ebde0c2959bfc2d79a15295d3b819d7/src/main/scala/qd/evaluator/TrieEvaluator.scala#L128

This will fail to evaluate rules where the body relation contains constants.

[HaoxianChen]

The same issue in other evaluators.

https://github.com/difflog-project/qd/blob/4af7366e1ebde0c2959bfc2d79a15295d3b819d7/src/main/scala/qd/evaluator/TrieSemiEvaluator.scala#L116

https://github.com/difflog-project/qd/blob/4af7366e1ebde0c2959bfc2d79a15295d3b819d7/src/main/scala/qd/evaluator/SeminaiveEvaluator.scala#L103

https://github.com/difflog-project/qd/blob/4af7366e1ebde0c2959bfc2d79a15295d3b819d7/src/main/scala/qd/evaluator/NaiveEvaluator.scala#L77