Adding example uploaded file at the system

data/db.json

-{"_default": {}}
\ No newline at end of file
+{"_default": {"1": {"file_code": "771-002-042", "uploaded_date": "2025-01-23_-_10-34-33", "original_name": "test_file_1.pdf", "new_file_name": "771-002-042___-___2025-01-23_-_10-34-33___-___test_file_1.pdf", "path": "/home/fejao/Coding/CCC/git_cccv/c3infodesk-printer/uploads/771-002-042___-___2025-01-23_-_10-34-33___-___test_file_1.pdf", "size": 9819, "num_pages": 1}}}
\ No newline at end of file