0.20.2

[0.20.2] - 2026-09-13

Added

• cairn stats reports edge resolution shares (exact / ambiguous /
  unresolved) over the calls/references candidate pool.
• cairn update embeds changed files' symbols when a semantic backend is
  reachable, and reports deferred embeds when none is available.
• cairn.json committed at the repo root excludes vendored dashboard static
  chunks and benchmark datasource corpora from indexing.

Changed

• cairn embed builds the multivector kinds (name, docstring) by
  default; --no-multivector restores single-vector builds.
• reindex_paths settles embed_symbols' buffered-batch degradation, keeping
  an open transaction from failing subsequent file legs or losing rows.
• Shared graph helpers (_select_stale_symbols, _purge_embedding_rows,
  _repo_relative_path) replace duplicated logic across the embedding and
  incremental paths.