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.
e578ec72f0