v0.1.6

• Allow rasuvaeff/understudy ^0.7. Widened rather than raised.
• The #[Before] guard is checked through real PHPUnit. It was covered only
  by a unit test calling runGuard() directly, which proves the condition and
  nothing about what a user sees — the guard fires from #[Before], so the
  failure lands on the BLAMELESS class, the one that ran after the leak, and
  that attribution is the whole diagnostic. A fixture now leaks a context from
  a class without the trait and pins the report, the attribution and the exit
  code.
• The Pest recipe runs in CI, and it was broken. The test that executes it
  skips itself unless the fixture project is installed, which was every run of
  every job — so the recipe had never actually been checked, and the fixture
  still stubbed find(7) with when() and claimed the same call with
  expect(): two registrations of one call, which the engine has refused with
  ConflictingExpectation since 0.3. The README's Pest section has been right
  all along; the fixture that was supposed to prove it had drifted, in the
  third place this same mistake has now been found. The job has a checkout of
  its own because the fixture's path repositories are written for the monorepo
  layout — this package and the engine side by side — which is deliberate:
  the recipe runs against the working tree of both.
• infection/infection moves to ^0.35, matching the monorepo templates.
  Re-measured: 12 of 12 mutants killed, unchanged.
• AGENTS.md said the unit tests avoid PHPUnit's assertion counter; they use
  it, by its new name. What actually guards the rename is the PHPUnit ^11.5
  matrix job, and the note says so now.