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/delete.rs

@@ -65,9 +65,7 @@ pub async fn handle_delete(
         match crate::chat::lookup::find_story_by_number(project_root, story_number) {
             Some(found) => found,
             None => {
-                return format!(
-                    "No story, bug, or spike with number **{story_number}** found."
-                );
+                return format!("No story, bug, or spike with number **{story_number}** found.");
             }
         };