DRPC gateway probes eth_getProof and marks the upstream 81% unavailable
when the pruned geth node returns 'header not found'. This is a false
positive - the node is healthy and advancing. Disable eth_getProof on the
linea pruned geth upstream to prevent DRPC from marking it unavailable.
Mirrors the existing pattern for BSC minimal in rpc-us-41.yaml.
Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>
