Add server timing headers in development #1864

Job	Run time
test (postgres, postgres, postgres://root:[email protected]/sqlpage)	1m 7s
compile_and_lint	56s
test (mysql, mysql, mysql://root:[email protected]/sqlpage)	58s
test (mssql, mssql, mssql://root:[email protected]/sqlpage)	1m 12s
docker_build (linux/arm64)	5m 21s
docker_build (linux/arm/v7)	5m 14s
test (odbc, postgres, Driver=/usr/lib/x86_64-linux-gnu/odbc/psqlodbcw.so;Server=127.0.0.1;Port=54...	1m 11s
docker_build (linux/amd64)	4m 42s
windows_test	3m 28s
docker_push	-1s
	24m 8s

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