Feature: Phase 3 — migrate TikaDocumentParser to ParserProtocol

Refactor TikaDocumentParser to satisfy ParserProtocol without subclassing
the legacy DocumentParser ABC:

- Add ClassVars: name, version, author, url
- Add supported_mime_types() classmethod (12 Office/ODF/RTF MIME types)
- Add score() classmethod — returns None when TIKA_ENABLED is False, 10 otherwise
- can_produce_archive = False (PDF is for display, not an OCR archive)
- requires_pdf_rendition = True (Office formats need PDF for browser display)
- __enter__/__exit__ via ExitStack: TikaClient opened once per parser
  lifetime and shared across parse() and extract_metadata() calls
- extract_metadata() falls back to a short-lived TikaClient when called
  outside a context manager (legacy view-layer metadata path)
- _convert_to_pdf() uses OutputTypeConfig() to honour the database-stored
  ApplicationConfiguration before falling back to the env-var setting
- Rename convert_to_pdf → _convert_to_pdf (private helper)

Update paperless_tika/signals.py shim to import from the new module path
and drop the legacy logging_group/progress_callback kwargs.

Update documents/consumer.py to extend the existing TextDocumentParser
special cases to also cover TikaDocumentParser (parse/get_thumbnail
signatures, __exit__ cleanup).

Add TestTikaParserRegistryInterface (7 tests) covering score(), properties,
and ParserProtocol isinstance check.  Update existing tests to use the new
accessor API (get_text, get_date, get_archive_path, _convert_to_pdf).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/documents/consumer.py

@@ -52,6 +52,7 @@ from documents.utils import copy_basic_file_stats
 from documents.utils import copy_file_with_basic_stats
 from documents.utils import run_subprocess
 from paperless.parsers.text import TextDocumentParser
+from paperless.parsers.tika import TikaDocumentParser
 from paperless_mail.parsers import MailDocumentParser
 
 LOGGING_NAME: Final[str] = "paperless.consumer"
@@ -67,7 +68,7 @@ def _parser_cleanup(parser: DocumentParser) -> None:
 
     TODO(stumpylog): Remove me in the future
     """
-    if isinstance(parser, TextDocumentParser):
+    if isinstance(parser, (TextDocumentParser, TikaDocumentParser)):
         parser.__exit__(None, None, None)
     else:
         parser.cleanup()
@@ -476,7 +477,7 @@ class ConsumerPlugin(
                     self.filename,
                     self.input_doc.mailrule_id,
                 )
-            elif isinstance(document_parser, TextDocumentParser):
+            elif isinstance(document_parser, (TextDocumentParser, TikaDocumentParser)):
                 # TODO(stumpylog): Remove me in the future
                 document_parser.parse(self.working_copy, mime_type)
             else:
@@ -489,7 +490,7 @@ class ConsumerPlugin(
                 ProgressStatusOptions.WORKING,
                 ConsumerStatusShortMessage.GENERATING_THUMBNAIL,
             )
-            if isinstance(document_parser, TextDocumentParser):
+            if isinstance(document_parser, (TextDocumentParser, TikaDocumentParser)):
                 # TODO(stumpylog): Remove me in the future
                 thumbnail = document_parser.get_thumbnail(self.working_copy, mime_type)
             else: