feat: レビュー指摘対応 db.disconnectのタイミング修正 https://nds-tyo.backlog.com/git/NEWDWH2021/newsdwh2021/pullRequests/161#comment-1843452 feat: レビュー指摘反映に伴い、検査例外を出す部分は一箇所に限定 https://nds-tyo.backlog.com/git/NEWDWH2021/newsdwh2021/pullRequests/161#comment-1843452 feat: レビュー指摘対応 https://nds-tyo.backlog.com/git/NEWDWH2021/newsdwh2021/pullRequests/161#comment-1843505 https://nds-tyo.backlog.com/git/NEWDWH2021/newsdwh2021/pullRequests/161#comment-1843511 feat: レビュー指摘反映 https://nds-tyo.backlog.com/git/NEWDWH2021/newsdwh2021/pullRequests/161#comment-1843529 feat: ログ出力レベルの調整。内部関数に_をつけた