docs(6206): settings, projects, api routes and three models drop citations; four capitalised services stragglers

- api.py's build-version docstring states why a channel name is not a build
  id, without the dated incident.
- rule_version states why rules need a history, without the rule that was
  rescoped and the date.
- Capitalised "Rule N" / "Milestone N" citations the earlier lowercase grep
  missed, in reply_shapes, supersession, services/family and models/family.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/scribe/services/reply_shapes.py

@@ -3,11 +3,11 @@
 WHY THIS EXISTS
 
 A reply is where the person the work is for finds out what happened, and they
-were not there while it was done. Milestone 409 wrote the shapes that make a
-reply readable to them — conclusion first, the shortest reply that carries the
-answer, where the work stands — and put them in one bundled skill. A skill
-arrives only when the agent decides to load it, so in a long session the shape
-faded out of context exactly when replies were getting longer.
+were not there while it was done. The shapes make a reply readable to them —
+conclusion first, the shortest reply that carries the answer, where the work
+stands. A skill arrives only when the agent decides to load it, so in a long
+session a shape held in a skill fades out of context exactly when replies get
+longer.
 
 So the shapes are product content held here, on the server, and delivered by
 the moments they belong to rather than by the agent remembering to ask: