My rule of thumb is: only use a module if you want to enforce a very opinionated way to create resources across multiple projects.
Most of the times you don't want that.
Regarding lambda, I also run a "make build" before "terraform apply". After all terraform is not a build tool.
But I do make the zip with data.archive_file so that I can pass the output_base64sha256 straight to the lambda resource.
My rule of thumb is: only use a module if you want to enforce a very opinionated way to create resources across multiple projects. Most of the times you don't want that.
Regarding lambda, I also run a "make build" before "terraform apply". After all terraform is not a build tool. But I do make the zip with data.archive_file so that I can pass the output_base64sha256 straight to the lambda resource.