ENH Improve type safety to support refactored template layer #477

Job	Run time
CI / Context	1s
CI / Generate matrix	14s
CI / Check governance	3s
CI / 8.3 prf-low mariadb phpunit all	2m 59s
CI / 8.3 mysql80 phpunit all	3m 9s
CI / 8.3 mysql80 phplinting	2m 13s
CI / 8.3 mysql80 endtoend root job1	9m 30s
CI / 8.3 mysql80 endtoend root job1	9m 28s
CI / 8.3 mysql80 endtoend root job2	8m 55s
CI / 8.3 mysql80 endtoend root job2	13m 39s
CI / 8.3 mysql80 endtoend root job3	7m 13s
CI / 8.3 mysql80 endtoend root job3	7m 5s
CI / 8.3 mysql80 js	4m 53s
CI / Dispatch tag patch release	0s
	1h 9m 22s

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