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/rmtree.rs

@@ -107,9 +107,7 @@ pub async fn handle_rmtree(
         return format!("Failed to remove worktree for story {story_number}: {e}");
     }
 
-    crate::slog!(
-        "[matrix-bot] rmtree command: removed worktree for {story_id} (bot={bot_name})"
-    );
+    crate::slog!("[matrix-bot] rmtree command: removed worktree for {story_id} (bot={bot_name})");
 
     let mut response = format!("Removed worktree for **{story_id}**.");
     if !stopped_agents.is_empty() {
@@ -131,11 +129,8 @@ mod tests {
 
     #[test]
     fn extract_with_full_user_id() {
-        let cmd = extract_rmtree_command(
-            "@timmy:home.local rmtree 42",
-            "Timmy",
-            "@timmy:home.local",
-        );
+        let cmd =
+            extract_rmtree_command("@timmy:home.local rmtree 42", "Timmy", "@timmy:home.local");
         assert_eq!(
             cmd,
             Some(RmtreeCommand::Rmtree {