fix logic and tests, update docker CI file

app/Services/Incidents/IncidentAnalysisService.php

@@ -65,13 +65,13 @@ class IncidentAnalysisService
             }
 
             if ($students[$studentKey]['last_incident'] === null) {
-                $students[$studentKey]['last_incident'] = $incident['incident_datetime'] ?? null;
+                $students[$studentKey]['last_incident'] = $this->formatIncidentDate($incident['incident_datetime'] ?? null);
             }
 
             $students[$studentKey]['logs'][] = [
                 'incident' => $incident['incident'] ?? '',
                 'incident_state' => $state,
-                'incident_datetime' => $incident['incident_datetime'] ?? null,
+                'incident_datetime' => $this->formatIncidentDate($incident['incident_datetime'] ?? null),
                 'open_description' => $incident['open_description'] ?? null,
                 'close_description' => $incident['close_description'] ?? null,
                 'cancel_description' => $incident['cancel_description'] ?? null,
@@ -89,4 +89,23 @@ class IncidentAnalysisService
 
         return $studentRows;
     }
+
+    private function formatIncidentDate(mixed $value): ?string
+    {
+        if ($value === null || $value === '') {
+            return null;
+        }
+
+        if ($value instanceof \DateTimeInterface) {
+            return $value->format('Y-m-d H:i:s');
+        }
+
+        $raw = (string) $value;
+        $ts = strtotime($raw);
+        if ($ts !== false) {
+            return date('Y-m-d H:i:s', $ts);
+        }
+
+        return $raw;
+    }
 }