Enhancement: support retain barcode split pages (#7912)

src/paperless/settings.py

@@ -932,6 +932,10 @@ CONSUMER_BARCODE_MAX_PAGES: Final[int] = __get_int(
     0,
 )
 
+CONSUMER_BARCODE_RETAIN_SPLIT_PAGES = __get_boolean(
+    "PAPERLESS_CONSUMER_BARCODE_RETAIN_SPLIT_PAGES",
+)
+
 CONSUMER_ENABLE_TAG_BARCODE: Final[bool] = __get_boolean(
     "PAPERLESS_CONSUMER_ENABLE_TAG_BARCODE",
 )