_resolve_api_key() only checks for apiKey / HONCHO_API_KEY, so all
CLI subcommands (identity --show, status, migrate, etc.) bail with
"No API key configured" on self-hosted instances that use baseUrl
without an API key.
Return "local" when baseUrl or HONCHO_BASE_URL is set, matching the
client.py behavior that already handles this case for the SDK.
Tested on: macOS, self-hosted Honcho (Docker, localhost:8000).
