Description

The Presto docker-compose.yaml hardcodes :dev image tags for both the presto-coordinator and presto-worker services:

This causes a problem: it's impossible to pin specific image versions on release branches, and the mutable :dev tag can silently change underneath users.

This PR:

• Replaces the hardcoded :dev tags with configurable environment variables that default to
  clp-v0.10.0:
  • CLP_PRESTO_COORDINATOR_IMAGE_TAG (default: clp-v0.10.0) for the coordinator service.
  • CLP_PRESTO_WORKER_IMAGE_TAG (default: clp-v0.10.0) for the worker service.

The versioned default (clp-v0.10.0) follows the convention used by other third-party services in the project that pin specific version tags (e.g., redis:7.2.4, mongo:7.0.1, rabbitmq:3.9.8).
The configurable env var approach follows the existing convention where Docker image references are overridable (e.g., CLP_DB_CONTAINER_IMAGE_REF in docker-compose-all.yaml).

Checklist

• The PR satisfies the [contribution guidelines][yscope-contrib-guidelines].
• This is a breaking change and that has been indicated in the PR title, OR this isn't a
  breaking change.
• Necessary docs have been updated, OR no docs need to be updated.

Validation performed

Scenario 1: Default image tags (no env vars set)

Task: Verify that with no env vars set, both images resolve to the :clp-v0.10.0 tag and no
pull_policy is configured (matching how other third-party services are defined).

Command:

cd tools/deployment/presto-clp
touch .env
docker compose config 2>&1 | grep -E "(image:|pull_policy:)"
rm .env

Output:

    image: ghcr.io/y-scope/presto/coordinator:clp-v0.10.0
    image: ghcr.io/y-scope/presto/prestissimo-worker:clp-v0.10.0

Explanation: Both services correctly default to :clp-v0.10.0. No pull_policy is present,
which matches the convention used by other third-party services (redis, mongo, rabbitmq).
Since the version tag is immutable, Docker's default pull_policy: missing is sufficient.

Scenario 2: Custom image tags via environment variables

Task: Verify that setting CLP_PRESTO_COORDINATOR_IMAGE_TAG and CLP_PRESTO_WORKER_IMAGE_TAG
overrides the default tag.

Command:

cd tools/deployment/presto-clp
echo -e "CLP_PRESTO_COORDINATOR_IMAGE_TAG=clp-v0.9.0\nCLP_PRESTO_WORKER_IMAGE_TAG=clp-v0.9.0" > .env
docker compose config 2>&1 | grep -E "(image:|pull_policy:)"
rm .env

Output:

    image: ghcr.io/y-scope/presto/coordinator:clp-v0.9.0
    image: ghcr.io/y-scope/presto/prestissimo-worker:clp-v0.9.0

Explanation: Both services correctly use the custom tag clp-v0.9.0, confirming that release
branches can pin specific image versions via these environment variables.
[yscope-contrib-guidelines]: https://docs.yscope.com/dev-guide/contrib-guides-overview.html

Summary by CodeRabbit

• Chores
  • Updated Presto deployment to use environment-driven image versioning for coordinator and worker services.
  • Enables specifying image tags at deploy time and ensures images refresh automatically during deployments.