Task failure Slack message log link doesn't show useful context

[AetherUnbound]

Description

The log URL which is given as part of ti.log_url does not provide a way to show more context from the DAG, i.e. there's no way to view the DAG graph or grid directly from the URL that's generated with log_url. This appears to go to a /log page, which doesn't have a clickable link to get back to the DAG page from it. Viewing the DAG graph or grid requires clicking on the DAGs list from that page, navigating to the appropriate DAG, and then navigating to the appropriate DAG run.

Current behavior

URL: https://airflow.openverse.org/log?execution_date=2024-04-14T00%3A00%3A00%2B00%3A00&task_id=ingest_data_day_shift_186.pull_mixed_data_day_shift_186&dag_id=wikimedia_reingestion_workflow&map_index=-1

Desired behavior

URL: https://airflow.openverse.org/dags/wikimedia_reingestion_workflow/grid?dag_run_id=scheduled__2024-04-14T00%3A00%3A00%2B00%3A00&task_id=ingest_data_day_shift_156.pull_mixed_data_day_shift_156&tab=logs

Notes

Since log_url appears to be the only relevant URL field available on the task instance object, we may need to construct the desired URL by hand.

[AetherUnbound]

Per apache/airflow#39179, we might be able to construct the URL ourselves using something similar:

https://github.com/apache/airflow/blob/b0e96131251c416f4d32ba60343ef3a6ecdb2346/airflow/www/views.py#L5186-L5205

[AetherUnbound]

#4180 can be used as a reference for this!

[AetherUnbound]

This will be resolved in Airflow 2.9.1! apache/airflow#39183