memoryd: sync begins when Honcho is turned on, and conclusions are matched by peer

Co-Authored-By: ornith-1.5-35b-a3b <agent@wntrmute.dev>

crates/memoryd/tests/honcho_mirror_serve.rs

@@ -140,9 +140,11 @@ fn conclude(peer: &str, session: &str, text: &str) -> Action {
     }
 }
 
+/// The deletion of the owner's conclusion `text`: every one these tests make is from `user.md`.
 fn unconclude(text: &str) -> Action {
     Action::Unconclude {
         workspace: Workspace::Trusted,
+        peer: "kyle".to_string(),
         text: text.to_string(),
     }
 }