feat: Allow skipping on template mapping errors, returning debug info (#3350)

* Refactor executors to return exceptions

* Accommodate prompts being mapped inside classify loop

* Update executor tests

* Add error handling to template mapping step

* Add/Update tests for retry and exception logging behavior

* Refactor executor to return a more information-rich status object

* Add tests for executor statuses

* Wire up execution details to output, allow continuing on failure

* Fix type annotations

* Address PR feedback

* Propagate class renaming properly