GET /tasks status filter returns empty results for status=open

[venkataramasu]

Summary

GET /tasks?status=open returns an empty list instead of open tasks.

Intended outcome

Filtering by status=open should return only tasks whose status is open.

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_filters_by_status

Repro logs

tests/test_api.py::test_list_tasks_filters_by_status FAILED

>       assert [task["id"] for task in payload] == [1, 3, 4]
E       AssertionError: assert [] == [1, 3, 4]

Notes

This is currently captured by automated HTTP-level test coverage in tests/test_api.py.