The GitLab project lives at simpl-open/data/supporting-data-services/distributed-execution/distributed-execution, so CI_REGISTRY_IMAGE ends in the project name twice. The pipeline pushes to CI_REGISTRY_IMAGE and nowhere else, so the earlier one-segment path named an image nobody builds - the same mismatch that field-level-pseudo-anonymisation and dataframe-level-anonymisation carry today.
Changelog: fixed
Canonical location for documentation, example workflows and reference service implementations covering distributed execution patterns. Covers AC1-AC4: execution-target selection, decision support, readiness checks and code-level linkage. Tightly coupled jobs and the loosely coupled subprocess transport are verified by the test suite; the Kubernetes pipes transport is implemented but not yet cluster-run and is marked as such in the guide.
Changelog: added
