Add server timing headers in development #1865

Job	Run time
test (mysql, mysql, mysql://root:[email protected]/sqlpage)	1m 17s
docker_build (linux/arm/v7)	4m 57s
test (mssql, mssql, mssql://root:[email protected]/sqlpage)	1m 28s
compile_and_lint	1m 13s
docker_build (linux/arm64)	5m 2s
test (postgres, postgres, postgres://root:[email protected]/sqlpage)	1m 24s
docker_build (linux/amd64)	4m 24s
windows_test	3m 5s
test (odbc, postgres, Driver=/usr/lib/x86_64-linux-gnu/odbc/psqlodbcw.so;Server=127.0.0.1;Port=54...	1m 31s
docker_push	0s
	24m 21s

Provide feedback