[AZ-422] Add FT-P-17 + FT-N-06 mid-flight tile blackbox tests

Implement the AC-8.4 and AC-NEW-6 blackbox scenarios for mid-flight
tile generation, dedup, landing-time upload, and freshness gating.

Helpers:
- runner/helpers/mid_flight_tile_evaluator.py — pure-logic evaluators
  for tile generation rate, Mode B Fact #105 schema check, footprint+
  GSD dedup (via geo.distance_m), upload-audit reconciliation, and
  the AC-5/AC-6 capture_utc + freshness-gate checks.
- runner/helpers/mock_suite_sat_audit.py — httpx wrapper for the
  mock-suite-sat-service /tiles/audit endpoint with strict response-
  shape validation.

Scenarios:
- tests/positive/test_ft_p_17_mid_flight_tiles.py
- tests/negative/test_ft_n_06_mid_flight_freshness.py

Both skip when sitl_replay_ready is false and fail loudly when fixture
records are missing (tests-as-gates discipline). 52 new unit tests
(41 evaluator + 11 audit client) cover every helper branch.

Review: PASS_WITH_WARNINGS (2 Low — duplicate haversine carry-over,
upstream production dependency surface).

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

e2e/_unit_tests/test_directory_layout.py

@@ -53,6 +53,8 @@ E2E_ROOT = Path(__file__).resolve().parents[1]
         "runner/helpers/ap_contract_evaluator.py",
         "runner/helpers/gcs_telemetry_evaluator.py",
         "runner/helpers/tile_cache_inspector.py",
+        "runner/helpers/mid_flight_tile_evaluator.py",
+        "runner/helpers/mock_suite_sat_audit.py",
         "runner/helpers/cold_start_evaluator.py",
         "runner/helpers/outlier_tolerance_evaluator.py",
         "runner/helpers/outage_request_evaluator.py",
@@ -112,11 +114,13 @@ E2E_ROOT = Path(__file__).resolve().parents[1]
         "tests/positive/test_ft_p_13_gcs_command.py",
         "tests/positive/test_ft_p_15_cache_schema.py",
         "tests/positive/test_ft_p_16_offline_only.py",
+        "tests/positive/test_ft_p_17_mid_flight_tiles.py",
         "tests/positive/test_ft_p_18_no_raw_retention.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",
+        "tests/negative/test_ft_n_06_mid_flight_freshness.py",
     ],
 )
 def test_required_path_exists(relative_path: str) -> None: