- Add to_json() and watch._check_shrink() regression tests that build a real
graph where build_from_json folds a semantic ghost into its AST twin (#4389),
plus a negative control showing a genuine semantic loss is still refused.
Both positive tests fail on v8 and pass with this branch.
- Update _fold_node_aliases / _fold_edge_aliases docstrings and the build()
dedup comment to list the new file/filepath and relationship aliases.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
(cherry picked from commit 946333b2ab)