bench(harnessx-removal): deterministic outputs byte-identical after the removal (task 7)

Reran benchmarks/harnessx_removal_equality.py record from a git archive
export of b9afb66 (tasks 1-6 landed; same venv freeze hash as the
baseline, harnessx not importable, no API keys, empty config) and
compared it against 2026-09-30-harnessx-removal-baseline:

  equal=True differences=0

All 13 output files (pairs.json, benchmark, standard scan, improve
--dry-run) are raw-byte identical to the baseline. The suite map
(suite-map.json) accounts for 29 deleted ids, 2 renamed ids and 83
added ids; each deleted or renamed id cites the design's Tests table and
commit cbadc38 or b9afb66. Every surviving test id keeps its outcome
(1740 passed, 38 skipped incl. the README xfail).

Instrument note: a first record failed test_push_hook twice because the
recording shell's PATH lacked .venv/bin (the hook execs `ousast`); the
same two tests fail at b9afb66 without it and pass with it. The
committed record has .venv/bin on PATH.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01EmM1j46qgKMh3zqD1QMwEo

.kiro/specs/harnessx-removal/tasks.md

@@ -50,7 +50,7 @@ and passed its fixture test. Every task is a commit gated on the full suite's ow
     reference search test (Req 2.4).
   - _Requirements: 2.1, 2.2, 2.3, 2.4_
 
-- [ ] 7. Equality proof
+- [x] 7. Equality proof
   - Rerun the baseline script; commit the comparison record next to the baseline; any difference outside the
     exclusion list blocks the merge.
   - _Requirements: 3.2_