0-based chunk position within the source.
v2.8.0 — content-source kind. Defaults to "md" for backward compat.
1-based ending line in the source (inclusive).
1-based starting line in the source.
Vault-relative path of the source note / PDF.
Cosine similarity (since vectors are L2-normalized at insert time).
Raw chunk text — caller can render snippets.
A single hit from EmbedDb.search. Mirrors the
FtsSearchHitshape so the RRF fusion layer can blend them by id (rel_path + chunk_index).