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-ui/src/app/data/paperless-config.ts

@@ -330,6 +330,13 @@ export const PaperlessConfigOptions: ConfigOption[] = [
     config_key: 'PAPERLESS_CONSUMER_TAG_BARCODE_SPLIT',
     category: ConfigCategory.Barcode,
   },
+  {
+    key: 'barcode_store_values',
+    title: $localize`Store Barcode Contents`,
+    type: ConfigOptionType.Boolean,
+    config_key: 'PAPERLESS_CONSUMER_STORE_BARCODE_VALUES',
+    category: ConfigCategory.Barcode,
+  },
   {
     key: 'ai_enabled',
     title: $localize`AI Enabled`,
@@ -458,6 +465,7 @@ export interface PaperlessConfig extends ObjectWithId {
   barcode_enable_tag: boolean
   barcode_tag_mapping: object
   barcode_tag_split: boolean
+  barcode_store_values: boolean
   remote_ocr_engine: string
   remote_ocr_api_key: string
   remote_ocr_endpoint: string