feat(gsm8k): Gate A1 multiplicative comparative recognizer injection (#805)
* feat(gsm8k): Gate A1 multiplicative comparative recognizer injection
Add COMPARATIVE_WITH_UNIT matcher/injector emitting compare_multiplicative
for the closed v1 template family (twice/thrice/N-times/half/quarter/third).
DCS yields comparative surfaces instead of detection-only fallback.
Includes ratified exemplar corpus + accepted recognizer proposal, 19 unit
tests, and live frontier proof that comparative_with_unit no-injection = 0.
wrong=0 preserved; no report.json rebaseline.
* fix(gsm8k): tighten Gate A1 N-times factors and confuser tests
Restrict comparative matcher N-times factors to plain digits and
single-word cardinals; refuse money, slash-fraction, hyphenated, and
indefinite surfaces. Strengthen confuser tests to assert empty injection
for any recognizer category; add graph-level refusal checks. Add Gate A1
lookback doc and EOF hygiene fixes.
* docs(analysis): pin Gate A1 lookback head SHA
* chore(gsm8k): fix Gate A1 file endings
bb0830046a