ref: Refactor `photodiodeSpot` and `photodiodeGhostBox` #192

Job	Run time
🧪 Build and Test (home, windows-latest)	3m 58s
🧪 Build and Test (home, macOS-latest)	2m 26s
🧪 Build and Test (home, ubuntu-latest)	1m 29s
🧪 Build and Test (clinic, windows-latest)	3m 56s
🧪 Build and Test (clinic, macOS-latest)	4m 5s
🧪 Build and Test (clinic, ubuntu-latest)	1m 17s
	17m 11s

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