Problem

We need to be able to check in enterprise licensed code that doesn't get built from the AGPL entrypoints. We also need to include the enterprise license itself so that people can understand what rights they do and do not have if they use this code.

Implementation notes

We will add an enterprise/ directory that contains new main() entrypoints for all released binaries. For the purpose of this ticket, these binaries are functionally identical to the AGPL binaries, and the main() functions in enterprise should call into AGPL packages.

Acceptance Criteria

1. New make targets that build enterprise variants of all the binaries we currently release. (We don't need enterprise variants of utilities in this issue.) Includes cross platform builds.
2. Release scripts are switched to use enterprise builds. AGPL "release" is not required, only the ability to build binary targets for all supported platforms.