[MetaROR] Ch5 Execution of Reproductions — author revisions

Author revisions for **Chapter 5 (Execution of Reproductions)** from the MetaROR reviews (R1).

- [x] Section 5.4: Consider suggesting development of the reproduction protocol on randomly re-ordered data (preserves distributional information without directional results). (R1) (in #41)
- [x] Section 5.2: Give the "Reproduction before Replication" subsection (robustness reproductions) its own paragraph. (R1) (in #41)

**Handled in other issues:**
- Discuss what "the same" means (or reference where it is discussed) → *Content gaps*
- Move/restructure Sections 5.2 and 5.3; merge Sections 5.5 (Deviations) and 5.6 (Analysis) → *Structural reorganisation & scope*
- Preregistration section angle/space (reviewer conflict R1↔R2) → *Points for discussion*
- Data-integrity ("reproduction light"), FAIR principles, "checking adherence to preregistration" → *Content gaps*

Start by reading Chapter 5, “Execution of Reproductions,” and review the completed changes referenced in #41. Check whether any author-revision item remains open; the listed revisions are checked or explicitly handled in other issues, so the issue is done when no unassigned Chapter 5 work remains.

Written by the indexing model from the issue text.