fix: validate complete-day monitoring coverage

src/fenris/projection.py

@@ -28,6 +28,7 @@ from datetime import datetime, timedelta, timezone
 from enum import Enum
 from typing import Any, Dict, List, Optional, Tuple
 
+from .monitoring_periods import interval_within_one_monitoring_period
 
 # ---------------------------------------------------------------------------
 # Constants (spec §6)
@@ -494,18 +495,16 @@ def _has_complete_local_day(conn):
     within a monitoring period that has usable observation evidence.
     This is the prerequisite for showing an endurance outlook.
     """
-    return _count_complete_local_days(conn) > 0
-
-
-def _count_complete_local_days(conn):
-    """Count the number of complete local observation days."""
-    row = conn.execute(
-        "SELECT COUNT(*) FROM local_days "
+    local_days = conn.execute(
+        "SELECT utc_start, utc_end FROM local_days "
         "WHERE complete = 1 "
         "AND activity_precision IN ('measured', 'coarse') "
-        "AND activity_intervals > 0"
-    ).fetchone()
-    return row[0] if row else 0
+        "AND activity_intervals > 0 ORDER BY id"
+    ).fetchall()
+    return any(
+        interval_within_one_monitoring_period(conn, utc_start, utc_end)
+        for utc_start, utc_end in local_days
+    )
 
 
 # ---------------------------------------------------------------------------