[MetaROR] Ch6 Execution of Replications — author revisions

Author revisions for **Chapter 6 (Execution of Replications)** from the MetaROR reviews (R1, R2, R3).

- [x] Section 6.2.1 (Small Telescope): Rewrite the explanation for clarity — the "rule of thumb" from Simonsohn (2015) is currently insufficiently explained. (R1) (in #40)
- [x] Section 6.2.1: Link the Small Telescope approach to the Open Science Collaboration (2015) reproducibility study. (R2) (in #40)
- [x] Section 6.3: Tie changes in methods back to deductive/inductive reasoning and underlying theory. (R1) — coordinate with the framework-integration task in *Cross-cutting editorial changes*. (in #40)
- [x] Section 6.4 (Piloting): Rewrite to better link the two paragraphs. (R1) (in #40)
- [x] Section 6.1: Review for replication-specific content — much of it is general preregistration advice that may already be familiar to the target audience. (R3) (in #40)

**Handled in other issues:**
- Merge Chapter 7 into Chapter 6 / Chapter 7 restructuring → *Points for discussion*
- Section 6.5 (Adversarial Collaborations) — expand or remove → *Points for discussion*

The listed Chapter 6 revisions are marked complete and were handled in pull request #40. Read that pull request to see the changes and avoid duplicating work; the issue also directs Chapter 7 restructuring and Section 6.5 decisions to the separate “Points for discussion” issue. There is no remaining task described here to complete.

Written by the indexing model from the issue text.