add payton's sections to chapter 9; remove unnecessary sections/screenshots, reformat as necessary

frontmatter/abstract.tex

@@ -14,6 +14,7 @@ Assignment 4 records the persistent Gitea service on the existing EC2 host,
 Elastic IP association, and separate team access. It also records Student Pack
 domain redemption, inviscid.dev registration and independently verified DNS,
 organization ownership, repository import, and the first open issue-linked PR.
-Public HTTPS, renewal and external exposure tests, container-replacement
-persistence verification, and both completed reviewed-merge workflows remain
-pending in this draft.
+It also records Caddy-terminated HTTPS with a Let's Encrypt certificate and
+renewal test, the EC2 security group with external exposure tests, a
+container-replacement persistence test, the product backlog, and two reviewed,
+issue-linked pull requests.