Fix: Scanner availability for series addition

- Change 'scanner' to 'serie_scanner' attribute name
- Update tests to match SeriesApp attribute naming
- Scanner now properly detected and called on add
- All add_series tests passing (9/9)

tests/api/test_anime_endpoints.py

@@ -42,7 +42,7 @@ class FakeSeriesApp:
     def __init__(self):
         """Initialize fake series app."""
         self.list = self  # Changed from self.List to self.list
-        self.scanner = FakeScanner()  # Add fake scanner
+        self.serie_scanner = FakeScanner()  # Add fake scanner (matches SeriesApp attribute name)
         self.directory = "/tmp/fake_anime"
         self.keyDict = {}  # Add keyDict for direct access
         self._items = [