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/auto_assign/scan.rs

@@ -31,7 +31,9 @@ pub(super) fn scan_stage_items(project_root: &Path, stage_dir: &str) -> Vec<Stri
 
     // Also include filesystem items (backwards compat / migration fallback).
     let dir = project_root.join(".huskies").join("work").join(stage_dir);
-    if dir.is_dir() && let Ok(entries) = std::fs::read_dir(&dir) {
+    if dir.is_dir()
+        && let Ok(entries) = std::fs::read_dir(&dir)
+    {
         for entry in entries.flatten() {
             let path = entry.path();
             if path.extension().and_then(|e| e.to_str()) == Some("md")
@@ -576,7 +578,9 @@ stage = "coder"
         );
 
         let count = count_active_agents_for_stage(&config, &agents, &PipelineStage::Coder);
-        assert_eq!(count, 1, "Only Running coder should be counted, not Completed");
+        assert_eq!(
+            count, 1,
+            "Only Running coder should be counted, not Completed"
+        );
     }
-
 }