SCHED-2368: Dummy change to learn PR workflow and soperator deployment

[Ronsenval]

Problem

New contributors need hands-on practice with the Soperator contribution workflow, including creating a correctly named branch, opening a pull request, selecting a PR build artifact, and validating it on a real test cluster.

This is a training-only change and does not address a production issue.

Solution

Added a harmless startup log message containing SCHED-2368 to the main Soperator binary. The marker makes it easy to confirm that the PR-built operator image is running on a test cluster.

This dummy change is not intended to be merged into main.

Testing

Local validation:

• Ran go test ./cmd.
• Ran git diff --check.
• Both commands completed successfully.

Real-cluster validation is pending. After deploying the image built by this PR, verify the marker in the operator logs:

kubectl logs -n <namespace> deployment/soperator-controller-manager \
  | rg 'SCHED-2368 dummy validation log'

Release Notes

No user-facing change. This PR adds a temporary log message solely for onboarding and workflow validation.