refactor(status): remove null fields

types/utils.ts

@@ -1,3 +1,8 @@
 export type Mutable<T> = {
   -readonly[P in keyof T]: T[P]
 }
+
+export type Overwrite<T, O> = Omit<T, keyof O> & O
+export type MarkNonNullable<T, K extends keyof T> = Overwrite<T, {
+  [P in K]-?: NonNullable<T[P]>
+}>