[renovate]

This PR contains the following updates:

Package	Type	Update	Change	Pending
mysql (source)		pinDigest	→ 76f0358
node (source)	final	minor	24.21.0 → 24.22.0	24.22.1
rundeck/node-demo	final	pinDigest	→ 587fe61

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🔵 Needs a closer look

Manual verification of Node.js release compatibility and a Compose smoke test covering database initialization, client setup, and SSH execution are needed before merging.

No open issues 🎉

What changed in this PR

This PR pins container images used by the SSHJ plugin’s Docker demo environment for reproducibility and updates the Node.js client image.

Changes:

• Pin the MySQL 8 and Rundeck node-demo images to specific digests.
• Update Node.js from 24.21.0 to 24.22.0 and pin its image digest.

No plugin implementation changes are included. Upstream release behavior and image compatibility remain unverified, so the small diff alone does not establish compatibility.

File	Description
docker/​node-demo/​Dockerfile	Pins the demo SSH node’s base image.
docker/​docker-compose.yml	Pins the demo environment’s MySQL 8 image.
docker/​client/​Dockerfile	Updates and pins the Node.js client image.

_{Review effort: Balanced}