fix: Add service containers and fix test failures

- Add Redis and RabbitMQ services to CI workflow
- Fix Jinja2 template error by passing file=None in error cases
- Fix test expecting dict response format for list_files endpoint
- Fix NOT NULL constraint by providing valid local_filename
- Fix retry-subtask to validate subtask name before checking processed file
- Add mock for process_document in reprocess test

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

tests/test_bulk_operations.py

@@ -147,9 +147,7 @@ class TestBulkOperations:
             file_record = FileRecord(
                 filehash=f"hash{i}",
                 original_filename=f"test{i}.pdf",
-                local_filename=(
-                    f"/tmp/test{i}.pdf" if i == 0 else None
-                ),  # Second file has no local file
+                local_filename=f"/tmp/test{i}.pdf",  # Both files have local_filename
                 file_size=1024,
                 mime_type="application/pdf",
             )