Restore the canonical mainnet docker-compose.supplier.yml to mirror
testnet's ollama-backed supplier (LLM_BACKEND=ollama, OLLAMA_URL points
at marketplace-mainnet-ollama, Traefik routes mp-suppliers.vector.apex-
fusion.org). The ChatGPT/Codex variant introduced in 965fabd moves to
docker-compose.supplier-gpt.yml with project name + container name
suffixed -gpt so both can coexist on the same host.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
