Two new real-draft-derived journal exemplars locking down prompt
rule 29 from the preceding commit. Follows the Hasanah precedent
for promoting real-draft failures into the canary corpus, per the
"defense in depth" feedback in project memory.
- journal_preposition_huttunen.toml exercises "among" mid-title,
plus four other CMOS 8.159 lowercased words ("on", "in", "a",
and implicitly "among"). Real article: Huttunen and Kortelainen,
JASIST 72, no. 7 (2021). The messy_input uses the ASCII hyphen
in "Meaning-Making" for clarity — the source draft actually had
a U+2010 non-breaking hyphen from docx->txt conversion, but
mixing Unicode hyphen normalization into this exemplar would
have conflated two independent failure modes. The U+2010 issue
is noted in the exemplar comment for a separate iteration.
- journal_preposition_mehra.toml exercises "beyond" mid-title,
plus mid-title exclamation-point preservation (rule 25) and
leading-"The" drop from "The Library Quarterly" (rule 17).
Real article: Mehra, Library Quarterly 91, no. 2 (2021).
Both are canary-enabled and will block any future prompt iteration
that regresses on these patterns via the exact-match canary axis.
The canonical dicts additionally lock them down via the field-
level diff, per the upstream-refinement feedback in project
memory.
Canary corpus size: 15 -> 17.
