fix: alerte critique si 0 zones ingérées + lastIngestionJob dans /api/status

backend/src/MessageHandler/IngestionScheduleHandler.php

@@ -43,15 +43,33 @@ final class IngestionScheduleHandler
         $this->logger->info('Scheduled ingestion started', ['date' => $date->format('Y-m-d')]);
 
         // Étape 1 : ingestion de toutes les zones
+        $succeeded = 0;
+        $failed    = 0;
         foreach (self::ZONES as $name => $bbox) {
             try {
                 $this->ingestion->ingestWithFallback($bbox, $date);
                 $this->logger->info('Zone ingested', ['zone' => $name]);
+                ++$succeeded;
             } catch (\Throwable $e) {
                 $this->logger->error('Ingestion failed', ['zone' => $name, 'error' => $e->getMessage()]);
+                ++$failed;
             }
         }
 
+        if ($succeeded === 0) {
+            $this->logger->critical('All zones failed — no data ingested this cycle', [
+                'date'  => $date->format('Y-m-d'),
+                'zones' => array_keys(self::ZONES),
+                'count' => $failed,
+            ]);
+        } else {
+            $this->logger->info('Ingestion cycle summary', [
+                'succeeded' => $succeeded,
+                'failed'    => $failed,
+                'date'      => $date->format('Y-m-d'),
+            ]);
+        }
+
         // Étape 2 : forecasts pour les observations sans prévision
         $observations = $this->em->getRepository(SargassumObservation::class)
             ->createQueryBuilder('o')