🚀 New
* Added `lvmopstools.devices.nps.read_nps`.
✨ Improved
* Several functions in `lvmopstools.devices.specs` now accept `ignore_errors` which replaces the values of unreachable devices with `None`.
* By default, return all values for all spectrographs in `spectrograph_pressures` and `spectrograph_mechanics`.
* Return `None` if ion pump fails to read.
* Allow to pass `internal` to `send_clu_command`.
🔧 Fixed
* `Retrier` backoff delay is now calculated as `delay * exponential_backoff_base ** (attempt - 1)`.