drime: fix User.EntryPermissions JSON unmarshalling

`json:"entry_permissions"` is known to be either empty [] or of
structure {string: boolean}. This may have been a breaking API change on
Drime's side. Because EntryPermissions is not used, the type was changed
to `any` to capture both cases, otherwise we could implement custom
unmarshalling for that type.

backend/drime/api/types.go

@@ -21,7 +21,7 @@ type User struct {
 	Avatar           string      `json:"avatar"`
 	ModelType        string      `json:"model_type"`
 	OwnsEntry        bool        `json:"owns_entry"`
-	EntryPermissions []any       `json:"entry_permissions"`
+	EntryPermissions any         `json:"entry_permissions"`
 	DisplayName      string      `json:"display_name"`
 }