test: arreglar inicialización de DB en tests de servidor

Co-authored-by: aider (openrouter/x-ai/grok-code-fast-1) <aider@aider.chat>

tests/unit/server.test.ts

@@ -26,6 +26,9 @@ beforeEach(() => {
   mockAdd = mock(() => Promise.resolve());
   ResponseQueue.add = mockAdd;
   
+  // Ensure database is initialized (recreates tables if dropped)
+  initializeDatabase(testDb);
+  
   // Reset database state between tests
   testDb.exec('DELETE FROM task_assignments');
   testDb.exec('DELETE FROM tasks');