On route `put /records/:rid` & `delete /records/:rid`, query nothing should get `{}`

[AdrieneTZ]

• In the controller file (controller link), putRecord & deleteRecord, if querying and not getting any record, the outcome value should be an empty object ({}), but now the outcome value is null.

• I am sure the outcome value was an empty object ({}) and somehow it became null. Maybe I changed the prisma setting by accident. I'll find out how to move back to the initial setting.

[wd-David]

I assume that https://github.com/davipon/snowball/pull/27/commits/100260a3eb51a086eb784a2e1924aa619173fccc had fixed this.