[ローカル用Sidekiq鯖]
= 変更前
default, mailer -> process=1, thread=128
= 変更後
default -> process=16, thread=16
push -> process=1, thread=4
pull -> process=1, thread=4
mailer -> process=1, thread=16
[リモート用Sidekiq鯖]
= 変更前
push, pull -> process=1, thread=16
= 変更後
default -> process=1, thread=16
push -> process=2, thread=16
pull -> process=1, thread=16