* PSD write recipes: keep every exported candidate and pin the base file
A case that failed after export dropped out of manifest.json, losing the
file a reference-editor check most needs. The CLI also reopened the corpus
path after the hash was taken.
- Keep the candidate and its hash once export succeeds.
- Run the CLI on a copy of the hashed bytes, so it never opens the corpus.
- Compare numbers by value, so 17 equals 17.0.
- tracking-split also checks runs 0 and 2 and all three run lengths.
Part of #6130.
* PSD write recipes: compare large integers exactly, reject case-only id clashes
Converting to f64 made 9007199254740993 equal 9007199254740992. Ids that
differ only by letter case name one output directory on a case-insensitive
filesystem, so they are now rejected as duplicates.
* PSD write recipes: test that the CLI receives the hashed bytes
* PSD write recipes: reject the contour library commands
Their path param can read or write any file, including the pinned base and
the corpus, and they edit no document.