[Zed Editor] XPEngine.Build crashes while typing and stops working until workspace reload

* Server: expert (id 0)
* Version: 0.1.0-rc.5-44a43e2
* Editor: Zed 0.225.10
* Ecto: 3.13.5
* Elixir 1.19.5-otp-28
* Erlang 28.3.1

When typing out Ecto schema definitions, I find Expert will often crash in the middle of typing a field (specifically right after I type the first letter of the field data type atom). I get a diagnostic message like this:

And in the LSP logs this error occurs:

```elixir
handled notification client -> server textDocument/didChange in 962µs
Node port message:
14:08:55.914 [error] GenServer XPEngine.Build terminating
** (stop) exited in: GenServer.call(Mix.ProjectStack, {:update_state, #Function<18.71857876/1 in Mix.ProjectStack.post_config/1>}, :infinity)
** (EXIT) no process: the process is not alive or there's no process currently associated with the given name, possibly because its application isn't started
(elixir 1.19.5) lib/gen_server.ex:1135: GenServer.call/3
(xp_engine 0.1.0-rc.5-44a43e2) lib/engine/mix.ex:20: anonymous fn/3 in XPEngine.Mix.in_project/2
(kernel 10.5) global.erl:703: :global.trans/4
(stdlib 7.2) timer.erl:599: :timer.tc/2
(xp_engine 0.1.0-rc.5-44a43e2) lib/engine/build/state.ex:153: anonymous fn/3 in XPEngine.Build.State.compile_file/2
(kernel 10.5) global.erl:703: :global.trans/4
(xp_engine 0.1.0-rc.5-44a43e2) lib/engine/build/state.ex:146: XPEngine.Build.State.compile_file/2
(stdlib 7.2) maps.erl:894: :maps.fold_1/4
Last message: :timeout
State: %XPEngine.Build.State{project: %XPForge.Project{root_uri: "file:///.../edi-sender", mix_exs_uri: "file:///.../edi-sender/mix.exs", mix_project?: true, mix_env: nil, mix_target: nil, env_variables: %{}, project_module: EdiSender.MixProject, entropy: 26199}, build_number: 0, uri_to_document: %{"file:///.../edi-sender/lib/edi_sender/edi/customer.ex" => #XPForge.Document, ...>}, project_compile: :none}
```

This error repeats if I try to change any document further and Expert will no longer provide diagnostics or cmd-click to go to module functionality until I reload the entire Zed workspace.