GET /tasks combined status+q filtering does not return expected matches

[venkataramasu]

Summary

Combined filters on GET /tasks (status + q) do not work as intended.

Intended outcome

GET /tasks?status=open&q=plan should return only matching open tasks.

Actual outcome

The endpoint returns [].

Reproduction steps

1. Install deps: python3 -m pip install -r requirements.txt
2. Run tests: pytest -v tests/test_api.py
3. Observe failure in test_list_tasks_combines_status_and_search

Repro logs

tests/test_api.py::test_list_tasks_combines_status_and_search FAILED

>       assert [task["id"] for task in response.json()] == [3]
E       assert [] == [3]

Notes

This is tracked separately because combined-query behavior is a critical API contract.