fix(test): improve test isolation and reduce noise in unit tests

- Add logger/error-utils mocks to cleaner-handler test to suppress IPC error log noise
- Move setupServiceMocks into beforeEach for consistent default mocking in cleaner tests
- Replace vi.waitFor (2s timeout) with setImmediate microtask flush in extractor test
- Remove dead activeType assignments in validation-database test
- Align TestUser.id type with UserInfo.id (string → number) and use deterministic counter

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/fixtures/types.ts

@@ -88,8 +88,8 @@ export interface Order {
  * Simplified user data for creating test users.
  */
 export interface TestUser {
-  /** User ID */
-  id: string
+  /** User ID (matches UserInfo.id: number) */
+  id: number
   /** Username for login */
   username: string
   /** User type/role */