docs: sort Prerequisites lists numerically ascending (#100)

Reorder the `## Prerequisites` bullets in 9 modules so prior modules
are listed lowest number first instead of by pedagogical importance or
at random. A trailing "Helpful but not required" group stays last and
is sorted within itself; multi-module bullets sort by their lowest
number. Intro/closing paragraphs are left in place. Prose is unchanged;
only bullet order moves.

Modules touched: 7, 9, 14, 15, 22, 24, 25, 26, 27. The other 18 modules
were already ascending (or have one/zero prereqs) and are untouched.
Module 19's "Helpful but not required: Module 16" correctly trails its
ascending 8/14/18 main list, so it stays as is.

Closes #100

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CamgR4HaVpfaqUViuHUcWw

modules/24-assistive-agents/README.md

@@ -25,14 +25,14 @@ trusting an agent in the loop, before Module 25 lets one actually open a PR.
 
 ## Prerequisites
 
+- **Module 5: Commit the AI's config.** The review rubric and the label taxonomy in this lab are
+  committed, versioned config: change how the agent behaves and it arrives as a reviewable diff.
 - **Module 9: Issues and the task layer.** You have issues describing work, and the idea that an
   assignee can be a human *or* an agent. The triage half of this module is the agent that sorts the
   incoming pile and decides which is which.
 - **Module 10: Reviewing code you didn't write.** You learned to read an AI's diff for plausibility
   traps, not just correctness. The review half hands the *first pass* of exactly that skill to an
   agent, so your attention lands where it matters.
-- **Module 5: Commit the AI's config.** The review rubric and the label taxonomy in this lab are
-  committed, versioned config: change how the agent behaves and it arrives as a reviewable diff.
 - **Module 22: Securing third-party MCP servers and skills.** The least-privilege and
   prompt-injection thinking from there is what keeps an assistive agent inside its lane. We lean on
   it directly in "Where it breaks."