Brummel
41804a39fb
When a fn-param is annotated (own T) but the body never consumes it (consume_count == 0) and never destructures it via match, the linearity pass now emits a Severity::Warning diagnostic with a form-A-rendered (borrow T) rewrite as suggested_rewrite. Pure advisory, Decision 10 unchanged. First Warning-severity diagnostic the typechecker emits; three CLI exit paths gated on Error-only. JOURNAL: design entry + iter 19a shipping entry.