dsh-tool-read-tiff: A TIFF Decoding Tool for DeepSeek Harness

The DeepSeek Harness (DSH) plugin `dsh-tool-read-tiff` addresses the limitation of visual models being unable to directly read scanned documents and scientific data formats. It decodes TIFF/TIF files into PNG and extracts full metadata, with multi-page processing support. By default, it returns the decoded file path and metadata, and can optionally integrate an OpenAI-compatible endpoint for visual descriptions. For security, the plugin rejects HTTP redirects and returns only text data; in single-page mode, multi-page files require repeated calls. Installation is simple and supports live configuration, greatly enhancing the model's ability to process scanned documents.