bug, refactor, test: make pragma history_length work interactively #544

Job	Run time
CI build test (3.10, ubuntu-latest, false)	12m 23s
CI build test (3.13t, ubuntu-24.04, true)	15m 4s
CI build test (3.12, ubuntu-latest, false)	10m 44s
CI build test (3.13, ubuntu-latest, false)	12m 37s
CI build test (3.8, ubuntu-22.04)	10m 31s
CI build test (3.7, ubuntu-22.04)	11m 43s
finish	4s
	1h 13m 6s

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