[francois-drielsma]

Prepare SPINE v1.4.0 from the configuration harmonization and calibration changes merged in #177, #178, and #179.

Bump the package version and document ordered pipelines, named-list edits, canonical provider descriptors, deferred-operation fixes, and calibration around deghosting. The migration notes explicitly cover removed YAML args/kwargs, strict descriptor validation, source-local missing-target policies, and separately prepared spine-prod changes.

This uses a minor version following the repository's existing release practice. It contains configuration compatibility changes; strict semantic versioning would instead require a major release. The version remains reviewable before tagging or publishing.

Validation:

• 25 release conditional-import smoke tests passed.
• Isolated wheel and source-distribution builds succeeded using pinned build dependencies.
• Both artifacts passed twine validation; version metadata and source-distribution contents verified.
• All 17 CI checks passed for the implementation in Unify ordered module and configuration conventions #179; this PR triggers a fresh run for release metadata.

No release tag or published GitHub/PyPI release has been created.