Actually run the eval and fix a hang when retrieving outline (#28547)

Release Notes:

- Fixed a regression that caused the agent to hang sometimes.

---------

Co-authored-by: Thomas Mickley-Doyle <tmickleydoyle@gmail.com>
Co-authored-by: Nathan Sobo <nathan@zed.dev>
Co-authored-by: Michael Sloan <mgsloan@gmail.com>

crates/eval/Cargo.toml

@@ -9,12 +9,13 @@ agent.workspace = true
 anyhow.workspace = true
 assistant_tool.workspace = true
 assistant_tools.workspace = true
+assistant_settings.workspace = true
 client.workspace = true
-collections.workspace = true
 context_server.workspace = true
 dap.workspace = true
 env_logger.workspace = true
 fs.workspace = true
+futures.workspace = true
 gpui.workspace = true
 gpui_tokio.workspace = true
 language.workspace = true
@@ -27,7 +28,6 @@ release_channel.workspace = true
 reqwest_client.workspace = true
 serde.workspace = true
 settings.workspace = true
-smol.workspace = true
 toml.workspace = true
 workspace-hack.workspace = true