docs(plugin): the instruction surfaces teach moments - reading a line that arrived at one, correcting a misfire, and giving a new rule its moments (milestone 458 step 8, #4926)

Until now only the tool arguments knew moments existed. The guidance
surfaces described rules as reached by resemblance alone:

- using-scribe: a short reflex paragraph and a new reference file,
  moments.md. It covers reading "at <moment>, reached by <action>", the
  reply held once at reply.report, map_action / unmap_action offered in
  one line, and the step 7 proposal line answered with judge_rule_moments.
- writing-records: asks WHEN a rule applies as well as what it is about.
  A rule, preference or process about a point in the work gets
  moments=[...] as it is written, and the trigger stays as the net.
- missed-retrieval: a missed WHEN is mounted or mapped, not reworded. A
  misfire is unmounted or unmapped.
- _INSTRUCTIONS: one clause (list_moments; mount rules about WHEN),
  1594 of 1600 chars.
- static context: injected lines include the rules mounted on a moment
  that was reached.
- test_guidance_ownership: three owned topics, so the text cannot quietly
  drop out.

Plugin minted.

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

plugin/hooks/scribe_static_context.md

@@ -16,8 +16,10 @@ What only Claude Code needs said:
   Scribe works alongside them.
 - **Lines injected beside your work are retrieval.** When the operator sends a
   message, and before a write or a command, Scribe may add rules, preferences,
-  notes and prior art that resemble what you are doing. Open the ones that
-  apply; using-scribe says what a quiet turn means.
+  notes and prior art that resemble what you are doing — and, when a tool call
+  or the reply ending a turn reaches a moment of work, the rules mounted on
+  it. Open the ones that apply; using-scribe says what a quiet turn means and
+  how to correct a moment that fired wrongly.
 - **Compact at clean seams.** Because work is recorded as you go, a compaction
   is safe once in-flight state is logged. After finishing a block of work in a
   long session, log it to Scribe, then tell the operator it's a good moment to