apply answerability-audit repair queue: ACCEPT variants, derivability fixes, rubric rewrites (46 masters)

- MISSING_ALTERNATIVES (63/64 applied): uncontracted/contracted forms, digit
  variants (05|5), synonyms and full-sentence variants, via ACCEPT lines and
  inline gap alternatives; skipped 'better/fine' for the Opposites drill (not
  opposites of "sick").
- NOT_DERIVABLE (16 fixed, 10 false alarms, 1 skipped): item-level fixes
  (visible word hints, missing premise, speaker clarifications "Joe (to Jim):",
  emphasis/cue corrections, un-gapped unguessable words, rounded-number
  accepts); converted the two book-10 paragraph clozes (Mary / The Mall) from
  CHECK: exact to CHECK: llm with logical-completion rubrics; cross-book
  recycled vocab (pilot, teller, barber, variety store, ...) left alone.
- UNCLEAR_TARGET (10): instruction/intro corrections (Food "Type the word for
  the food.", Explain-with-Too intro), cue/emphasis fixes.
- Rubric rewrites (57): applied audit-suggested grader rubrics (now effective
  with the pre-item RUBRIC parser fix); moved the two per-item rubrics of
  book-11 "Write the Main Idea" inside their items.

No clip-bearing line changed; all masters validate (0 errors, 0 new warnings)
and pass stage-master clip-identity checks. Full decision log:
reactor-module-tools module-convert/answerability-audit/APPLIED.md

Co-authored-by: Cursor <cursoragent@cursor.com>

book-9-lesson-4.module

@@ -2127,7 +2127,7 @@ ACCEPT: $254.97
 
 PROMPT: In January, Sam had $231.00 in his checking account. In February, he deposited $58.20. In March, he deposited $83.10. In April, he withdrew $45.00. About how much money does Sam have in his savings account in May? {bk09-l4c-f5-02-q.mp3}
 RESPONSE: 327.30 {bk09-l4c-f5-02-a.mp3}
-ACCEPT: $327.30 | 327.3
+ACCEPT: $327.30 | 327.3 | 327 | $327 | 330 | $330
 
 PROMPT: Jack works 40 hours every week. He works 49 weeks every year. In 1988, he was sick for a total of 30 hours. How many hours did Jack work? {bk09-l4c-f5-03-q.mp3}
 RESPONSE: 1930 {bk09-l4c-f5-03-a.mp3}