Is it okay to call wagyu::execute() multiple times?

Is it okay to call wagyu::execute() multiple times on same wagyu instance?
Or, should I build new wagyu instance for each execution?

Here are some example usecases:

* add/add/execute(union)/execute(difference)
* add/add/execute(union)/add/execute(intersection)

If it is allowed, is it thread-safe?

Thank you.

Start at the wagyu::execute() entry point and inspect the implementation and any existing API documentation or tests for repeated execution, added geometries, and concurrent use. Confirm the supported lifecycle and thread-safety expectations, then document the answer with a focused regression test or usage example if the repository has an appropriate location.

Written by the indexing model from the issue text.