[JanusGraph/janusgraph] 991e9f: Bump DB images & add persistent volumes

[dblugeon]

Branch: refs/heads/master
Home: https://github.com/JanusGraph/janusgraph
Commit: 991e9f1e369e35f0179de6232a07886b87979b2b
https://github.com/JanusGraph/janusgraph/commit/991e9f1e369e35f0179de6232a07886b87979b2b
Author: dblugeon <dblu...@users.noreply.github.com>
Date: 2026-05-19 (Tue, 19 May 2026)

Changed paths:
M janusgraph-dist/docker/examples/docker-compose-cql-es.yml

Log Message:
-----------
Bump DB images & add persistent volumes

* Update Cassandra image to 4.0.20
* Update Elasticsearch image to 8.19.15
* Increase Cassandra health‑check retries. On slow disks, Cassandra could incorrectly be marked unhealthy with the previous settings
* Add JCE_ELASTICSEARCH_DATA and JCE_CASSANDRA_DATA compose environment variables. Use docker volumes janusgraph-cassandra-data and janusgraph-elasticsearch-data by default

Signed-off-by: dblugeon <dblu...@users.noreply.github.com>



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