Sprint 56h: butterfly effect + character sheet auto-import

- drafting.yml: add {character_profiles} in PASS 0, PASS 3 character state
  extraction, rag_write for character-state asset (enables butterfly effect
  in draft mode), document for character-state file, conditional_skills
- character_sheet.yml: add rag_write step writing voice-sig-{slug} asset
  so auto-import can pick up completed character sheets from RagMemory
- book_chapter.yml: package hint now detects new characters from PASS 3
  Character State (spawns character_sheet tasks) and detects Permanent:YES
  changes (spawns character_update tasks)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

templates/character_sheet.yml

@@ -74,6 +74,21 @@ steps:
   - type: document
     filename: "character-{character_name_slug}"
 
+  - type: rag_write
+    asset_id: "voice-sig-{character_name_slug}"
+    hint: |
+      Extract ONLY the voice signature entry for {character_name} in this exact format.
+      Do NOT include any other sections. Do NOT paraphrase — copy directly from the
+      Voice Signature section of the character sheet you just wrote.
+
+      ### {character_name} — Voice Signature
+      - Role: [from ## Identity: Role field]
+      - Voice tone: [from ## Voice Signature: stress scale value]
+      - Speech pattern: [from ## Voice Signature: sentence length pattern]
+      - What they NEVER say: [from ## Voice Signature: never-say entry]
+      - Verbal tic: [from ## Voice Signature: tic/catchphrase entry]
+      - Notes: [first 2 bullets from ## Notes for Writers]
+
   - type: close
     rag_update: true