Doc SQL-example verification clusters

Disposable StarRocks clusters used by the documentation SQL-example checker (docs/scripts/run_sql_samples.py) to confirm the ```sql examples in the docs still run on a given release.

Version alignment

Test the docs for a version against a cluster of that same version. The image tag is set by the SR_VERSION environment variable (default: the current release). So to verify the 3.5 docs, run the 3.5 cluster and point the checker at a branch-3.5 docs checkout.

Usage

# current release (default)
docker compose -f docker-compose-shared-nothing.yml up -d --wait

# a specific release — the docs branch you test must match
SR_VERSION=3.5 docker compose -f docker-compose-shared-nothing.yml up -d --wait

# shared-data (FE + CN + MinIO), for cloud-native / storage-volume examples
SR_VERSION=4.1 docker compose -f docker-compose-shared-data.yml up -d --wait

The FE is reachable on 127.0.0.1:9030 (MySQL protocol), user root, no password. Tear down with docker compose -f <file> down.

Which compose?

• shared-nothing (FE + BE) — the default for most sql-reference examples.
• shared-data (FE + CN + MinIO) — for examples that need cloud-native tables, storage volumes, or datacache (run the checker with --profile shared-data).