docs: Gate 5 closeout - AAR, harvest, design doc done

The design doc closes with its AAR (planned/actual/why/learnings, the
six acceptance criteria checked off 6/6, the session's shakiest calls
named) and moves to docs/design/done/ with status done. Harvest: a
stolpersteine wiki page distilled from the AAR (hex is not a git SHA,
TZ on the git process, python floor, anonymous Gitea negatives,
negative tests, directory links), and the neckbeard feedback list
becomes issue 0040 - a deliberate separate act, per the design's
non-goals. Operational follow-up is issues 0041 (refine imported
wartegrund) and 0042 (go-live: push, first mirror run, CI schedule,
milestone for gitops#61). Final chain green: validate 0/0 over 36 open
issues, gen_status --check current, drift 0, prosa 0.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/adr/0012-issues-im-repo-gitlab-als-spiegel.md

@@ -6,7 +6,7 @@ date: 2026-08-11
 supersedes: null
 superseded_by: null
 related:
-  - "docs/design/2026-08-11-neckbeard-migration.md"
+  - "docs/design/done/2026-08-11-neckbeard-migration.md"
   - "docs/adr/0002-issues-und-management-ins-lab.md"
   - "docs/adr/0005-pm-framework-kanban.md"
 ---

docs/adr/0013-gruppenregeln-kanonisch-mit-pruefung.md

@@ -6,7 +6,7 @@ date: 2026-08-11
 supersedes: null
 superseded_by: null
 related:
-  - "docs/design/2026-08-11-neckbeard-migration.md"
+  - "docs/design/done/2026-08-11-neckbeard-migration.md"
   - "docs/adr/0001-gitlab-kanonisch-push-mirror.md"
 ---