v0.9.0

Changed

• croc hunt now follows crawl's mirrors: breadcrumb. A doc's
  mirrors: source (the file a crawl-generated stub shadows) is
  treated as an implicit tracked source, unioned with tracks:, so
  drift detection works on raw crawl output with no croc attack step
  and no stem resolution. This closes a gap where docs whose filename
  stem repeats across directories (always self.md / __init__.md,
  often ordinary repeats like models.py) could never be bound by
  attack's tree-wide stem index and so were invisible to hunt.
  Directory docs (self.md) mirror a directory and are skipped
  (file-mirrors only); a source that is both tracks:-bound and
  mirrors:-bound alerts once. On by default with no opt-out —
  trees whose docs carry mirrors: may surface alerts they previously
  (silently) missed. The per-alert message is now
  "<doc>: bound source <path> changed". Mirror matching assumes
  crawl was run from the repo root (so the breadcrumb is repo-root-
  relative and lines up with git diff paths); anchoring subtree-
  crawled mirror paths to the repo root is a tracked follow-up.