fix: add --all to cargo fmt in script/test and autoformat codebase

cargo fmt without --all fails with "Failed to find targets" in
workspace repos. This was blocking every story's gates. Also ran
cargo fmt --all to fix all existing formatting issues.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/src/chat/transport/matrix/rebuild.rs

@@ -73,11 +73,8 @@ mod tests {
 
     #[test]
     fn extract_with_full_user_id() {
-        let cmd = extract_rebuild_command(
-            "@timmy:home.local rebuild",
-            "Timmy",
-            "@timmy:home.local",
-        );
+        let cmd =
+            extract_rebuild_command("@timmy:home.local rebuild", "Timmy", "@timmy:home.local");
         assert_eq!(cmd, Some(RebuildCommand));
     }