feat(Phonology/Autosegmental): precedence-preserving subcategory PrecAR#750
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Add the precedence-preserving wide subcategory
PrecARand make lenition a literal functor on it; consolidate the subgraph/embedding content into oneEmbedding.lean.precPreserving : MorphismProperty (AR α β)(order-embedding tier maps) +IsMultiplicative→PrecAR := WideSubcategory precPreserving— the morphism-axis analogue ofWellFormedAR's object-axisObjectProperty.FullSubcategory(same mathlib construction on the two axes;Categoryinherited free).Studies.LaoideKemp2026'sdelinkInitialis now a literalFunctor PrecAR PrecAR(delinkInitialFunctor), so "lenition is functorial over precedence-preserving maps but not over arbitraryAR.Hom" (delinkInitial_not_functorial) is a typed theorem.Subgraph.lean+ the new subcategory intoEmbedding.lean: the Graph-level containment relation (SubgraphEmbeds/Free, [jardine-2017] Ch. 5) and the AR-morphism order-embedding subcategory (Ch. 7), with their relationship stated precisely.