[AZ-424] [AZ-425] [AZ-426] Implement negatives set (FT-N-01/03/04)

Adds three pure-logic evaluators + scenarios + unit tests covering the
project's failure-mode robustness ladder (AC-3.1, AC-3.4, AC-3.5,
AC-NEW-8):

* outlier_tolerance_evaluator (AZ-424 / FT-N-01): per-event 50 m drift
  bound + 3-frame covariance-monotonic window over the AZ-408 outlier
  injector's medium-density manifest.
* outage_request_evaluator (AZ-425 / FT-N-03): detects 3+ consecutive
  missing-frame windows; validates OPERATOR_RELOC_REQUEST STATUSTEXT
  arrives at 2 s ±500 ms, dead_reckoned label during outage, and no
  FC EKF divergence.
* blackout_spoof_evaluator (AZ-426 / FT-N-04): eight-AC ladder across
  the 5 s / 15 s / 35 s sub-windows — switch latency, spoof rejection,
  monotonic covariance, honest horiz_accuracy, STATUSTEXT 1-2 Hz,
  35 s escalation thresholds, and recovery gate.

Each scenario is skip-gated on the AZ-441 / AZ-407 / AZ-416 replay /
SITL / mavproxy helpers; unit tests (14 + 18 + 29 = 61) cover the
AC logic today. Full e2e unit-test suite: 527 passed (+67).

Co-authored-by: Cursor <cursoragent@cursor.com>

e2e/_unit_tests/test_directory_layout.py

@@ -52,6 +52,9 @@ E2E_ROOT = Path(__file__).resolve().parents[1]
         "runner/helpers/msp_frame_observer.py",
         "runner/helpers/ap_contract_evaluator.py",
         "runner/helpers/cold_start_evaluator.py",
+        "runner/helpers/outlier_tolerance_evaluator.py",
+        "runner/helpers/outage_request_evaluator.py",
+        "runner/helpers/blackout_spoof_evaluator.py",
         "fixtures/mock-suite-sat/Dockerfile",
         "fixtures/mock-suite-sat/app.py",
         "fixtures/mock-suite-sat/requirements.txt",
@@ -96,7 +99,10 @@ E2E_ROOT = Path(__file__).resolve().parents[1]
         "tests/positive/test_ft_p_09_inav.py",
         "tests/positive/test_ft_p_10_smoothing_lookback.py",
         "tests/positive/test_ft_p_11_cold_start_init.py",
+        "tests/negative/test_ft_n_01_outlier_tolerance.py",
         "tests/negative/test_ft_n_02_sharp_turn_failure.py",
+        "tests/negative/test_ft_n_03_outage_reloc.py",
+        "tests/negative/test_ft_n_04_blackout_spoof.py",
     ],
 )
 def test_required_path_exists(relative_path: str) -> None: