feat(analysis): _max_zero_streak su flag fetch_ok

tests/unit/test_data_audit.py

@@ -7,6 +7,7 @@ from datetime import UTC, datetime
 from cerbero_bite.analysis.data_audit import (  # noqa: PLC2701
     _detect_gaps,
     _expected_ticks,
+    _max_zero_streak,
 )
 
 
@@ -77,3 +78,19 @@ def test_detect_gaps_ignores_threshold_boundary() -> None:
         datetime(2026, 5, 12, 12, 20, tzinfo=UTC),
     ]
     assert _detect_gaps(ts) == ()
+
+
+def test_max_zero_streak_empty() -> None:
+    assert _max_zero_streak([]) == 0
+
+
+def test_max_zero_streak_no_zeros() -> None:
+    assert _max_zero_streak([1, 1, 1, 1]) == 0
+
+
+def test_max_zero_streak_single_zero_block() -> None:
+    assert _max_zero_streak([1, 0, 0, 0, 1, 0, 1]) == 3
+
+
+def test_max_zero_streak_all_zeros() -> None:
+    assert _max_zero_streak([0, 0, 0]) == 3