Initial open-source release

Claude-Session: https://claude.ai/code/session_01B65qLEKnkeYTGdbwhLpjCu

fixtures/python-app/src/tasks/__init__.py

@@ -0,0 +1,5 @@
+"""A tiny task tracker used as an OpenIDEA QA fixture."""
+
+from .models import Priority, Task, TaskList
+
+__all__ = ["Priority", "Task", "TaskList"]