Use explicit zsh command for conductor-setup.sh

Prevents permission denied errors by explicitly invoking zsh
instead of relying on execute permissions.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

conductor.json

@@ -1,6 +1,6 @@
 {
     "scripts": {
-        "setup": "./conductor-setup.sh",
+        "setup": "zsh conductor-setup.sh",
         "run": "bun run dev:bun"
     }
 }