Returns a specification to start this module under a supervisor.

See Supervisor.

@spec load_kernels(
  [String.t()],
  keyword()
) :: {:ok, map()} | {:error, term()}

Loads validated kernel paths into the native worker.

@spec metadata() :: {:ok, map() | nil}

Returns metadata for the currently loaded kernel set, if any.

@spec start_link(keyword()) :: GenServer.on_start()

Starts the named SPICE server process.

@spec state(String.t(), float(), keyword()) :: {:ok, map()} | {:error, term()}

Returns native SPICE state data for a resolved SPICE target string.

@spec utc_to_et(DateTime.t()) :: {:ok, float()} | {:error, term()}

Converts a UTC datetime to SPICE ephemeris time through the native worker.