feat(analysis): _max_zero_streak su flag fetch_ok

src/cerbero_bite/analysis/data_audit.py

@@ -126,6 +126,19 @@ def _expected_ticks(since: datetime, until: datetime) -> int:
     return math.ceil(span_seconds / (_TICK_INTERVAL_MIN * 60))
 
 
+def _max_zero_streak(flags: list[int]) -> int:
+    """Longest run of consecutive zeros."""
+    longest = 0
+    current = 0
+    for v in flags:
+        if v == 0:
+            current += 1
+            longest = max(longest, current)
+        else:
+            current = 0
+    return longest
+
+
 def _detect_gaps(timestamps: list[datetime]) -> tuple[GapRecord, ...]:
     """Return gaps where consecutive timestamps differ by > threshold."""
     out: list[GapRecord] = []