Zeno v2 is not safe anymore

Since https://github.com/internetarchive/Zeno/commit/15ec750298682b8af332e39cec5715bafb0ae22c the reactor returns errors instead of panic()'ing on critical errors. As detailed here : https://github.com/internetarchive/Zeno/pull/475#issuecomment-3323191272 this should cause an immediate crash as this means there is a bug introduced in the code by a developer, this should not be an error that goes unnoticed. As one of the original developers of Zeno v2 and the one who came up with the original design I deem this software as unsafe until this kind of changes are reverted.