Function embedding_document 

pub fn embedding_document(title: impl Display, content: impl Display) -> String

#1558 batch 5 wave 2 — the canonical embedding/rerank document template: "{title} {content}".

LOAD-BEARING: every surface that embeds a memory (store / update / dedup-check / reflect / federation refresh / backfill) and the cross-encoder reranker must build the document text with this exact template — a drifted spelling at any one site would silently skew similarity scores between write-time vectors and query-time comparisons. One definition; byte-identical to the prior inline format! at every routed site.