Fix AVAGO_STAKING_PORT to use fixed port 9651 instead of salted client_port.
Fix port mapping from {{ client_port }}:{{ client_port }} to {{ client_port }}:9651
to ensure container uses fixed P2P port while host binds to salted port.
Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>