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>