Upload files to Govilo and generate unlock links via Bot API. Use when: (1) Creating a Govilo unlock link from a ZIP, folder, or individual files, (2) Automating file upload to Govilo R2 storage with presigned URLs, (3) Managing Govilo Bot API interactions (presign → upload → create item). Requires GOVILO_API_KEY and SELLER_ADDRESS env vars. If missing, guides user to register at https://govilo.xyz/.