DAG list page: show task state counts for the most recent DAG run per DAG

### Description Airflow 2 showed a "Recent Tasks" column on the DAG list page with colored circles representing the task state breakdown of the most recent DAG run for each DAG (running, queued, failed, up_for_retry, success, etc.). Airflow 3 removed this entirely. There is no equivalent anywhere in the UI. The request is to bring back per-DAG task state counts for the most recent run on the DAG list page, with the ability to click a state count to jump directly to the filtered task list or DAG run for that DAG. ### Use case/motivation The "Recent Tasks" column served two purposes: health overview and quick navigation. For health overview, you could scan the entire DAG fleet in one glance and immediately spot: - DAGs stuck in running or queued state (hung tasks) - DAGs with tasks in up_for_retry (transient failures in progress) - DAGs with failed tasks before the whole run completed For quick navigation, clicking a state circle took you directly to the relevant tasks or DAG run filtered by that state, without having to go through multiple pages. In Airflow 3 none of this is possible from the DAG list. To check task-level state for any DAG you have to click into it, navigate to the Tasks tab or Grid view, and check manually, one DAG at a time. In a fleet of dozens of DAGs this makes routine health checks and incident triage significantly slower. ### Related issues _No response_ ### Are you willing to submit a PR? - [ ] Yes I am willing to submit a PR! ### Code of Conduct - [x] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)