fix: preserve commit-quality blocking in bash dispatcher

scripts/hooks/pre-bash-commit-quality.js

@@ -380,7 +380,11 @@ function evaluate(rawInput) {
 }
 
 function run(rawInput) {
-  return evaluate(rawInput).output;
+  const result = evaluate(rawInput);
+  return {
+    stdout: result.output,
+    exitCode: result.exitCode,
+  };
 }
 
 // ── stdin entry point ────────────────────────────────────────────