Database retention policy is now available in environments with Airflow 3, starting with composer-3-airflow-3.1.0-build.5

## Feature Feature [**Database retention policy**](https://docs.cloud.google.com/composer/docs/composer-versioning-overview#comparison-airflow-versions)is now available in environments with Airflow 3, starting with composer-3-airflow-3.1.0-build.5. This change is gradually rolled out in several releases and is available in the following regions in this release: africa-south1, asia-east1, asia-northeast2, asia-northeast3, asia-south2, asia-southeast2, asia-southeast3, australia-southeast2, europe-central2, europe-north2, europe-southwest1, europe-west10, europe-west12, europe-west15, europe-west4, europe-west6, europe-west8, europe-west9, me-central1, me-central2, me-west1, northamerica-northeast1, northamerica-northeast2, northamerica-south1, southamerica-east1, southamerica-west1, us-east5, us-south1, us-west3, us-west4. ## Fix Fixed Fixed an issue where the Copy button on the DAG details page in the Airflow UI was copying incorrect content. ## Change Change New [Airflow builds](https://cloud.google.com/composer/docs/composer-versions#images-composer-3)are available in Cloud Composer 3: * [composer-3-airflow-3.1.0-build.6](https://cloud.google.com/composer/docs/versions-packages#composer-3-airflow-3-1-0-build-6) * [composer-3-airflow-2.10.5-build.23](https://cloud.google.com/composer/docs/versions-packages#composer-3-airflow-2-10-5-build-23) (default) * [composer-3-airflow-2.9.3-build.43](https://cloud.google.com/composer/docs/versions-packages#composer-3-airflow-2-9-3-build-43) ## Change Change New [images](https://cloud.google.com/composer/docs/composer-versions#images-composer-2)are available in Cloud Composer 2: * [composer-2.16.1-airflow-2.10.5](https://cloud.google.com/composer/docs/versions-packages#composer-2-16-1-airflow-2-10-5) (default) * [composer-2.16.1-airflow-2.9.3](https://cloud.google.com/composer/docs/versions-packages#composer-2-16-1-airflow-2-9-3) ## Deprecate Deprecated The following Cloud Composer versions and builds have reached their[end of support period](https://cloud.google.com/composer/docs/composer-versioning-overview#version-deprecation-and-support): composer-3-airflow-2.9.3-build.11, composer-2.10.1-\*.