Also provide the original file name to the post consumption script

docs/advanced_usage.rst

@@ -171,6 +171,7 @@ into paperless. It receives the following environment variables:
 * ``DOCUMENT_THUMBNAIL_URL``
 * ``DOCUMENT_CORRESPONDENT``
 * ``DOCUMENT_TAGS``
+* ``DOCUMENT_ORIGINAL_FILENAME``
 
 The script can be in any language, but for a simple shell script
 example, you can take a look at `post-consumption-example.sh`_ in this project.

src/documents/consumer.py

@@ -203,6 +203,7 @@ class Consumer(LoggingMixin):
         script_env["DOCUMENT_TAGS"] = str(
             ",".join(document.tags.all().values_list("name", flat=True)),
         )
+        script_env["DOCUMENT_ORIGINAL_FILENAME"] = str(document.original_filename)
 
         try:
             Popen(