通过 SambaNova 连接模型服务

用户层 [model_providers.sambanova]，base_url 是 https://api.sambanova.ai/v1，env_key = SAMBANOVA_API_KEY，wire_api = responses。再用 ~/.codex/sambanova.config.toml 和 --profile sambanova。

model = "MiniMax-M2.7"
model_provider = "sambanova"
approval_policy = "on-request"
sandbox_mode = "workspace-write"

[model_providers.sambanova]
name = "SambaNova"
base_url = "https://api.sambanova.ai/v1"
env_key = "SAMBANOVA_API_KEY"
wire_api = "responses"