Ensure no unresolved types in the definition files (#6521)

* Ensure no unresolved types in the definition files

* Address feedback and general cleanup

* Move import from @constants/x to @constants where relevant

* Remove unneeded "import as"

app/database/operator/server_data_operator/handlers/index.test.ts

@@ -9,7 +9,6 @@ import {
 } from '@database/operator/server_data_operator/transformers/general';
 
 import type ServerDataOperator from '..';
-import type {Model} from '@nozbe/watermelondb';
 
 describe('*** DataOperator: Base Handlers tests ***', () => {
     let operator: ServerDataOperator;
@@ -104,13 +103,11 @@ describe('*** DataOperator: Base Handlers tests ***', () => {
         expect(appDatabase).toBeTruthy();
         expect(appOperator).toBeTruthy();
 
-        const transformer = async (model: Model) => model;
-
         await expect(
             operator?.handleRecords({
                 fieldName: 'invalidField',
                 tableName: 'INVALID_TABLE_NAME',
-                transformer,
+                transformer: transformSystemRecord,
                 createOrUpdateRawValues: [{id: 'tos-1', value: '1'}],
                 prepareRecordsOnly: false,
             }),