Feature: store barcode contents, list and search them (#14276)

* Feature: store barcode contents, list and search them

New setting PAPERLESS_CONSUMER_STORE_BARCODE_VALUES (off by default)
stores all barcodes found during consumption with the document: page,
type and content. They are listed on the metadata tab with a copy
button, returned by the documents API and searchable with barcodes:
in the advanced search. Versions keep their own barcodes, reprocessing
reads them again. Refs #9898

* Tests: cover the remaining barcode branches

Covers unchanged and failing barcode reads on reprocessing, unsupported files and DocumentBarcode.__str__, and uses toHaveLength in the barcode list spec as suggested by SonarCloud.

* Address review: keep barcodes when they can't be read, format choices

- Reprocessing and new versions keep the stored barcodes when the file
  can't be scanned or the scan fails, and replace them atomically.
- Format is a TextChoices of the zxing-cpp formats, with a test.
- Shared scan code, latest_version helper, TypedDict, serializer reuse.
- Barcodes in the split manifest, export/import tests, pytest-style tests.

* Barcode tests: TIFF reprocess, format check both ways, fixtures

- Reprocessing a TIFF with TIFF support off keeps the stored barcodes.
- The format test also fails when zxing-cpp drops a format.
- Fixtures in place of the sample dir mixin, plugin-level disabled test.
- Format labels aren't translated, OpenAPI enum named BarcodeFormatEnum.

* Review: module-level zxing reader, shorter barcode docs

- read_barcodes_zxing is a module-level function used by scan_pdf.
- Drop the trivial __str__ test, mark it no cover.
- Shorten the barcode docs and remove the duplicate in configuration.md.

* Fix header

* Use utility class

* Return barcodes from the metadata endpoint only

Drop the barcodes field and its prefetches from the document serializer,
as agreed in the review. Also remove the now empty component stylesheet.

---------

Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>

src/documents/versioning.py

@@ -166,6 +166,25 @@ def get_latest_version_for_root(
     return latest or root_doc
 
 
+def latest_version(document: Document) -> Document:
+    """
+    The newest version of a root document, or the document itself if it has
+    no versions or is a version. Reads a prefetched "versions" lookup when
+    there is one and queries otherwise.
+    """
+    if document.root_document_id is not None or document.pk is None:
+        return document
+    prefetched_cache = getattr(document, "_prefetched_objects_cache", None)
+    prefetched_versions = (
+        prefetched_cache.get("versions") if isinstance(prefetched_cache, dict) else None
+    )
+    if prefetched_versions is None:
+        return get_latest_version_for_root(document)
+    if not prefetched_versions:
+        return document
+    return sort_versions_newest_first(list(prefetched_versions))[0]
+
+
 def resolve_requested_version_for_root(
     root_doc: Document,
     request: Request,