Brummel
bdc383eb8b
The RED half of a RED-first iteration for the optimize/argmax orchestration axis (C12 axis 2). Pins the headline behaviour before the feature exists: optimize(&SweepFamily, metric) returns the single winning SweepPoint — its params coordinate AND its RunReport — chosen by the metric's fixed per-metric sense of best (reusing rank_by's direction semantics), with ties resolving to the earliest enumeration-order point. No caller-supplied direction: that would contradict the shipped rank_by invariant that "best" is fixed by each metric's meaning, and would admit incoherent asks (e.g. the worst max_drawdown). One definition of best per metric. RED for the right reason — optimize is absent (E0425), the sole error; cargo build --workspace stays green (test-only module). GREEN lands in the following commit, which closes #67.