`find_references` tool not found in `quorum` mode

WebUI
<img width="545" height="164" alt="Image" src="https://github.com/user-attachments/assets/e74c8271-2ccb-4185-b249-e53a235badb5" />
TUI
<img width="775" height="176" alt="Image" src="https://github.com/user-attachments/assets/058111d9-6356-46e5-9ab8-36eb29f2fd83" />

related file: crates/agent/examples/confs/coder_delegate.toml