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/agents/pool/process.rs

@@ -34,7 +34,11 @@ impl AgentPool {
 
     /// Test helper: inject a child killer into the registry.
     #[cfg(test)]
-    pub fn inject_child_killer(&self, key: &str, killer: Box<dyn portable_pty::ChildKiller + Send + Sync>) {
+    pub fn inject_child_killer(
+        &self,
+        key: &str,
+        killer: Box<dyn portable_pty::ChildKiller + Send + Sync>,
+    ) {
         let mut killers = self.child_killers.lock().unwrap();
         killers.insert(key.to_string(), killer);
     }