refactor: track import progress per film instead of per batch

Replace batch-level progress (processedBatches/totalBatches) with
film-level progress (processedFilms/totalFilms) for smoother UI updates.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/Entity/Import.php

@@ -30,15 +30,12 @@ class Import
     #[ORM\Column(length: 20)]
     private string $status = self::STATUS_PENDING;
 
-    #[ORM\Column]
-    private int $totalBatches = 0;
-
-    #[ORM\Column]
-    private int $processedBatches = 0;
-
     #[ORM\Column]
     private int $totalFilms = 0;
 
+    #[ORM\Column]
+    private int $processedFilms = 0;
+
     #[ORM\Column]
     private int $failedFilms = 0;
 
@@ -91,25 +88,14 @@ class Import
         return $this;
     }
 
-    public function getTotalBatches(): int
+    public function getProcessedFilms(): int
     {
-        return $this->totalBatches;
+        return $this->processedFilms;
     }
 
-    public function setTotalBatches(int $totalBatches): static
+    public function setProcessedFilms(int $processedFilms): static
     {
-        $this->totalBatches = $totalBatches;
-        return $this;
-    }
-
-    public function getProcessedBatches(): int
-    {
-        return $this->processedBatches;
-    }
-
-    public function setProcessedBatches(int $processedBatches): static
-    {
-        $this->processedBatches = $processedBatches;
+        $this->processedFilms = $processedFilms;
         return $this;
     }