Refactor request handling to separate data and state #1976

Job	Run time
test (odbc, postgres, Driver=PostgreSQL Unicode;Server=127.0.0.1;Port=5432;Database=sqlpage;UID=r...	2m 0s
test (mysql, mysql, mysql://root:[email protected]/sqlpage)	1m 14s
compile_and_lint	1m 42s
test (mssql, mssql, mssql://root:[email protected]/sqlpage)	1m 46s
windows_test	2m 43s
docker_build (linux/amd64)	4m 43s
test (postgres, postgres, postgres://root:[email protected]/sqlpage)	1m 49s
docker_build (linux/arm64)	5m 35s
docker_build (linux/arm/v7)	5m 4s
docker_push	-1s
	26m 35s

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