[AZ-428] [AZ-429] [AZ-430] [AZ-431] Add NFT-PERF-01..04 perf scenarios

Batch 85 — 4 Performance NFT scenarios + pure-logic evaluators.

- NFT-PERF-01 (AZ-428, Tier-2): two-config e2e latency p95 ≤ 400 ms
  (K=3@25°C, K=2 hybrid@50°C) + frame-drop ≤10% + informational per-stage
  partition recording (D-CROSS-LATENCY-1).
- NFT-PERF-02 (AZ-429): inter-emit p95 ≤ 350 ms + no ≥3 missed-emit
  windows. fc-adapter-aware SITL timestamp extraction (tlog vs MSP).
- NFT-PERF-03 (AZ-430, Tier-2): cold-start TTFF p95 ≤ 30 s AND max ≤ 45 s
  over N≥10 iterations.
- NFT-PERF-04 (AZ-431): spoof-promotion latency p95 ≤ 600 ms over N≥20
  randomized-start blackout+spoof events.

All scenarios consume external fixtures (AZ-595 dependency surfaced) and
fail loudly when fixtures are missing or empty. Public-boundary
discipline preserved — evaluators do NOT import src/gps_denied_onboard.

Tests: 60 new unit tests pass; 24 scenarios collect (4 tests × 2 fc × 3
vio). Code review: PASS_WITH_WARNINGS — 1 Medium (fixed in batch),
3 Low (production-dependency surfacings + future hygiene).

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

e2e/_unit_tests/test_directory_layout.py

@@ -63,6 +63,10 @@ E2E_ROOT = Path(__file__).resolve().parents[1]
         "runner/helpers/blackout_spoof_evaluator.py",
         "runner/helpers/fc_proxy_runtime.py",
         "runner/helpers/replay_mode.py",
+        "runner/helpers/streaming_evaluator.py",
+        "runner/helpers/spoof_promotion_evaluator.py",
+        "runner/helpers/ttff_evaluator.py",
+        "runner/helpers/e2e_latency_evaluator.py",
         "fixtures/sitl_replay_builder/__init__.py",
         "fixtures/sitl_replay_builder/builder.py",
         "fixtures/sitl_replay_builder/build_p01_fixtures.py",
@@ -125,6 +129,10 @@ E2E_ROOT = Path(__file__).resolve().parents[1]
         "tests/negative/test_ft_n_04_blackout_spoof.py",
         "tests/negative/test_ft_n_05_stale_tile_rejection.py",
         "tests/negative/test_ft_n_06_mid_flight_freshness.py",
+        "tests/performance/test_nft_perf_01_e2e_latency.py",
+        "tests/performance/test_nft_perf_02_streaming.py",
+        "tests/performance/test_nft_perf_03_ttff.py",
+        "tests/performance/test_nft_perf_04_spoof_promotion.py",
     ],
 )
 def test_required_path_exists(relative_path: str) -> None: