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Bump max mapped task for all Airflow instances to 1200
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Description

In T389773: Adjust maximum number of mapped tasks in the airflow instance we upped the max mapped task to 1200, but only for the test_k8s instance.

On the main instance, we have multiple DAGs that map by wiki_id, and thus currently at ~883 tasks.

Let's make that former bump a global setting that applies to all instances and proactively take care of this potential issue.

This would we needed as well for T404084: Move the dumps_v1 DAGs from the Airflow test_k8s instance to a dedicated instance.

Event Timeline

Change #1195985 had a related patch set uploaded (by Brouberol; author: Brouberol):

[operations/deployment-charts@master] airflow-main: increase max_map_length from 1024 to 1200

https://gerrit.wikimedia.org/r/1195985

brouberol changed the task status from Open to In Progress.Oct 14 2025, 8:58 AM

Change #1196026 had a related patch set uploaded (by Brouberol; author: Brouberol):

[operations/deployment-charts@master] airflow: set the default DAG parsing interval to 300s

https://gerrit.wikimedia.org/r/1196026

Change #1195985 merged by Brouberol:

[operations/deployment-charts@master] airflow: increase max_map_length from 1024 to 1200

https://gerrit.wikimedia.org/r/1195985