ENH Improve type safety to support refactored template layer #951

Job	Run time
CI / Context	1s
CI / Generate matrix	20s
CI / Check governance	0s
CI / 8.3 prf-low mariadb phpunit all	1m 25s
CI / 8.3 mysql80 phpunit all	1m 21s
CI / 8.3 mysql80 phplinting	1m 46s
CI / 8.3 mysql80 endtoend root job1	2m 47s
CI / 8.3 mysql80 endtoend root job2	5m 47s
CI / 8.3 mysql80 endtoend root job3	2m 13s
CI / 8.3 mysql80 js	1m 38s
CI / Dispatch tag patch release	0s
	17m 18s

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