Add RPM sanity check/filtering in software
During the CHARM campaign in Aug 2023 we observed that above ~100Gy it happens that RPM value reported is very wrong (e.g. >10 000) or jumps by a large value from one readout to another. These kind of unrealistic values should be filtered out in software. Also if the RPMs are stuck at unreasonable value, the regulation should just continue feeding the last "known good" PWM value.