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/factory.ts

@@ -73,10 +73,12 @@ export class UserFactory {
   /**
    * Generate unique user ID
    *
-   * @returns Unique ID string in format USR-{timestamp}-{random}
+   * @returns Unique numeric ID
    */
-  private static generateId(): string {
-    return `USR-${Date.now()}-${Math.random().toString(36).substr(2, 6)}`
+  private static idCounter = 0
+
+  private static generateId(): number {
+    return ++UserFactory.idCounter
   }
 
   /**