Complete the implementation of ECP-230134, updating SPS-CBF SPEAD time fields

• The implementation of the ECP is initiated, keeping pace with the changes on the CBF side. The SPEAD headers should be shown to be using the revised time-stamping format up to the point implemented by the CBF team so that integration tests show that the CBF accepts the data.
• Any necessary changes should also be made to the DAQ RX stack, so that it can receive the new format.

Implementation has been initiated. Firmware modifications have included a new reference time register and non-zero frame counter restart. This allows a TPM to be resynchronized to a station without resynchronising the entire station of TPMs. The TPM being resynchronized is still required to be re-initialised but future work is planned in PI 22 to remove this limitation and allow resynchronisation by stopping and starting data acquisition. Testing is under way, comparing detailed firmware operation between old and new firmware.

In addition to the above, further work is also needed to modify the SPEAD header contents and propagate these changes to the DAQ library. Therefore this feature has been clone into PI22 as SP-4181.