Figure out why second call in public test fails (the fidelity call)

[sgbaird]

closes #254

self-driving-lab-demo/tests/sdl_demo_light_test.py

Lines 116 to 121 in d0a2ec9

	# FIXME: check fidelity implementation against microcontroller code
	# and MicroPython output
	# fidelity_results = sdl.evaluate(
	# dict(R=10, G=11, B=12, atime=100 * 2, astep=999 * 2, gain=128 * 2)
	# )
	# print(fidelity_results)

The issue might be partially related to pytest, the running of 3.8 and 3.10 at the same time, etc. Hard to say without seeing the MicroPython terminal while github actions is running (and maybe monitoring the messages via HiveMQ).