The 0.1.7 line's SettingsForms service retired the `get(ns)` section
read, so the balance route never resolved the DeepSeek API key on V4+
deployments and the capsule stayed hidden. deepseekSectionOf now folds
over whichever face the running line serves: the registered
`llm-deepseek` section through V3, and on V4+ the Config-form
`describe()` projection, matching the provider's row by its own
apiKeyEnv-bearing section shape and preferring the settings ids the
generations have served it as. Rows fold in isolation, and a describe
that throws is no section — the capsule still arms nowhere it cannot.
The per-baseline `balance` probe pins the settings face and the
provider row's sources against each tag's real sources.