Update bun.lock and remove DependencyManager tests

- Added new dependency "@techniker-me/tools" and updated existing dependencies to specific versions in bun.lock
- Removed the DependencyManager test file as part of codebase cleanup

__test__/mocks/MockUserServices.ts

@@ -0,0 +1,14 @@
+import type {Logger} from './MockLogger';
+import type {Database} from './MockDatabase';
+
+export class UserService {
+  constructor(
+    private db: Database,
+    private logger: Logger
+  ) {}
+
+  public getUser(id: number) {
+    this.logger.debug(`Getting user ${id}`);
+    return this.db.query(`SELECT * FROM users WHERE id = ${id}`);
+  }
+}