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/pipeline/merge.rs

@@ -85,10 +85,11 @@ impl AgentPool {
         let sid = story_id.to_string();
         let br = branch.clone();
 
-        let merge_result =
-            tokio::task::spawn_blocking(move || crate::agents::merge::run_squash_merge(&root, &br, &sid))
-                .await
-                .map_err(|e| format!("Merge task panicked: {e}"))??;
+        let merge_result = tokio::task::spawn_blocking(move || {
+            crate::agents::merge::run_squash_merge(&root, &br, &sid)
+        })
+        .await
+        .map_err(|e| format!("Merge task panicked: {e}"))??;
 
         if !merge_result.success {
             return Ok(crate::agents::merge::MergeReport {
@@ -185,8 +186,8 @@ impl AgentPool {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
     use super::super::super::AgentPool;
+    use super::*;
     use crate::agents::merge::{MergeJob, MergeJobStatus};
     use std::process::Command;