Automerge/samod pending issues

- [x] `samod`: Fix `MapError` error on the sync server - https://github.com/paulsonnentag/automerge-rust-sync-server/issues/8. Causing frequent crashes. Alex looking into it.
- [x] `samod`: Clearing project and recreating on `backend-refactor` causing errors -- reported similar issue here: https://github.com/alexjg/samod/issues/61
- [ ] `automerge`: With binary doc handling, we need an efficient `fork_at`. Also, `fork` is slow immediately after the first files-added commit. Performance issues reported to Alex who is looking into it.
- [ ] `automerge-repo`: With `automerge-repo` in typescript (NOT samod), the server crashes on client interrupt. https://github.com/LilithSilver/patchwork-godot-ts-server. Reported to Alex; very low priority.
- [ ] `automerge`: Fix slow `variant_parser` hydration/reconciliation; Nikita spoke to Alex about it
- [x] `patchwork-godot-plugin`: Integrate `samod/main` for new server stuff testing
- [ ] `automerge`: Add "revert to heads" feature for documents, creating a new revert commit. (low priority!)
- [ ] tokio-console support for debugging: https://github.com/alexjg/samod/issues/99
- [ ] https://github.com/alexjg/samod/pull/103, and update samod on server and client
- [ ] Natively supported document links with a clockument (highest priority) (Alex is working on it)

Review the unchecked entries and their linked samod issues and pull request, including the sync-server crashes, variant_parser performance, revert-to-heads feature, tokio-console support, and document links. Start with the highest-priority document-links item, which the issue says Alex is working on. Done means the pending items are resolved or explicitly updated here.

Written by the indexing model from the issue text.