perf: Only search the potentially changed constraints in lexical_region_resolve
perf: Only search the potentially changed constraints in lexical_region_resolve

aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust