Refactor: wire RemoteDocumentParser into consumer and fix signals

- paperless_remote/signals.py: import from paperless.parsers.remote
  (new location after git mv). supported_mime_types() is now a
  classmethod that always returns the full set, so get_supported_mime_types()
  in the signal layer explicitly checks RemoteEngineConfig validity and
  returns {} when unconfigured — preserving the old behaviour where an
  unconfigured remote parser does not register for any MIME types.

- documents/consumer.py: extend the _parser_cleanup() shim, parse()
  dispatch, and get_thumbnail() dispatch to include RemoteDocumentParser
  alongside TextDocumentParser. Both new-style parsers use __exit__
  for cleanup and take (document_path, mime_type) without a file_name
  argument.

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

src/documents/consumer.py

@@ -51,6 +51,7 @@ from documents.templating.workflows import parse_w_workflow_placeholders
 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.remote import RemoteDocumentParser
 from paperless.parsers.text import TextDocumentParser
 from paperless_mail.parsers import MailDocumentParser
 
@@ -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, RemoteDocumentParser)):
         parser.__exit__(None, None, None)
     else:
         parser.cleanup()
@@ -476,7 +477,10 @@ class ConsumerPlugin(
                     self.filename,
                     self.input_doc.mailrule_id,
                 )
-            elif isinstance(document_parser, TextDocumentParser):
+            elif isinstance(
+                document_parser,
+                (TextDocumentParser, RemoteDocumentParser),
+            ):
                 # TODO(stumpylog): Remove me in the future
                 document_parser.parse(self.working_copy, mime_type)
             else:
@@ -489,7 +493,7 @@ class ConsumerPlugin(
                 ProgressStatusOptions.WORKING,
                 ConsumerStatusShortMessage.GENERATING_THUMBNAIL,
             )
-            if isinstance(document_parser, TextDocumentParser):
+            if isinstance(document_parser, (TextDocumentParser, RemoteDocumentParser)):
                 # TODO(stumpylog): Remove me in the future
                 thumbnail = document_parser.get_thumbnail(self.working_copy, mime_type)
             else:

src/paperless_remote/signals.py

@@ -1,13 +1,23 @@
 def get_parser(*args, **kwargs):
-    from paperless_remote.parsers import RemoteDocumentParser
+    from paperless.parsers.remote import RemoteDocumentParser
 
     return RemoteDocumentParser(*args, **kwargs)
 
 
 def get_supported_mime_types():
-    from paperless_remote.parsers import RemoteDocumentParser
+    from django.conf import settings
 
-    return RemoteDocumentParser(None).supported_mime_types()
+    from paperless.parsers.remote import RemoteDocumentParser
+    from paperless.parsers.remote import RemoteEngineConfig
+
+    config = RemoteEngineConfig(
+        engine=settings.REMOTE_OCR_ENGINE,
+        api_key=settings.REMOTE_OCR_API_KEY,
+        endpoint=settings.REMOTE_OCR_ENDPOINT,
+    )
+    if not config.engine_is_valid():
+        return {}
+    return RemoteDocumentParser.supported_mime_types()
 
 
 def remote_consumer_declaration(sender, **kwargs):