v1.1.3 — Mutation-testing audit: vacuous tests fixed, py.typed shipped

[1.1.3] - 2026-07-03

Fixed — deep-audit round 4: mutation testing + shipped-artifact audit

Round 4 turned the audit on the TEST SUITE and the PACKAGING — layers
no code-reading or fuzzing round can reach. A 14-mutant battery
(deliberate bugs injected into critical lines, one at a time) exposed
two vacuous regression tests guarding changelog-advertised guarantees:

• test_v042_post_does_NOT_retry_on_5xx never tested its claim.
  The fixture builds the client with max_retries=0 — NOTHING retries
  in that configuration, so the test passed even with POST added to
  the idempotent-retry set. The CRITICAL double-write guard from
  v0.4.2 (duplicate $3/mo trackers) had zero effective coverage. Now
  runs with retries enabled.
• test_v050_compare_periods_no_overlap asserted on its own local
  re-implementation of the window arithmetic — it never called
  compare_periods, so the v0.5.0 double-count fix could regress
  without any test failing. Rewritten end-to-end against the window
  boundaries the tool actually returns.
• 36500-day cap had no boundary coverage — a mutant raising the
  cap 1000× survived (the existing test used 10**18, which any large
  cap rejects). Added days=36500/36501 boundary test.
• 1 equivalent mutant identified and documented (paginate total_pages
  min-clamp is shadowed by the while-loop bound — differs only in
  warning emission). Final score: 13/13 non-equivalent mutants killed.

Fixed — packaging

• py.typed was missing from the wheel (PEP 561). The project
  ships mypy-strict annotations and documents library usage, but
  without the marker downstream type checkers ignore ALL annotations.
  Added marker + package-data config; verified present in the built
  wheel.

Documentation

• Docstring Args drift fixed on update_user (5 params undocumented),
  get_text_message, get_webhook (account_id undocumented) — found
  by a mechanical docstring-vs-signature sweep across all 59 tools.

Verified

• Shipped PyPI artifact (1.1.2) smoke-tested in a clean venv on
  Python 3.14: installs, imports, registers all 59 tools.
• Tests 395 → 396.