Adds DIRTY_FINGERPRINT = "" to _build_info.py's committed fallback stub
and cli.py's separate ImportError fallback class. New
_compose_version_display() applies the strip-and-append rule via a
genuine anchored removesuffix("-dirty"), mirroring the C/Go
implementations (tasks 3.1/4.4/4.5).
Updates one pre-existing test whose hard-coded literal-GIT_COMMIT
assertion no longer holds once a fingerprint is present, to compute its
expected value via the production function instead -- independently
assessed by review as a legitimate strengthening, not a weakened check.
4 new dedicated unit tests independently guard the transform itself with
hard-coded literal assertions, including an anchored-suffix-not-blind-
substring regression case.
Verified independently by review (including a second, differently-
constructed mutation test) across both install paths via a full real
/xce-build xceadmin cycle: editable install shows "unknown, unknown" with
no import error; wheel built from the dirty tree shows <hash>-<fingerprint>,
never <hash>-dirty-<fingerprint>. 267 passed/3 skipped.
This completes all xceadmin work (tasks 5.1-5.2) for this spec.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>