My Flutter Web service has been stuck on "scheduling build on Metal builder (builder-cbuxkt)" for over 10 minutes without executing a single line of the Dockerfile. The build never starts and eventually fails with "Failed to build an image."

What I've tried:

- Multiple redeployments

- Switched builder back and forth between Nixpacks and Dockerfile

- Updated the Dockerfile to use a lighter base image (debian:bookworm-slim instead of ghcr.io/cirruslabs/flutter:stable)

- Verified Root Directory and Dockerfile path (/Dockerfile) are correct

Build logs only show:

```

scheduling build on Metal builder "builder-cbuxkt"

scheduling build on Metal builder "builder-cbuxkt"

Setup:

- Branch: main

- Builder: Dockerfile at /Dockerfile

- No Root Directory set (Dockerfile is at repo root)

- Plan: Hobby (paid)

This seems to be an infrastructure issue on Railway's side as the configuration is correct and was working before. Please advise.