Make version:development honor RELEASE_BUMP

[ivanasabi]

Related distribution validation: #1135. Related release decoupling: #1163.

Problem

version:development currently hardcodes a minor increment. A governed major or patch release would therefore advance to the wrong next development version even when the release itself uses the requested bump.

Acceptance criteria

• Read and validate the governed RELEASE_BUMP value.
• Produce the correct next development version for major, minor, and patch releases.
• Reject missing or unsupported bump values rather than silently defaulting.
• Add tests covering all supported bumps and a no-publish release rehearsal.

This is product-owned and must not be implemented in an engine PR.

[ivanasabi]

Cerrada porque se abrió antes de confirmar el límite operativo de esta remediación: no se realizarán mutaciones ni gestión de issues en repositorios de producto. El hallazgo queda como prerequisito externo, gestionado fuera de este workstream.