dsh-vet-visit: Pet Checkup Frequency Plan Generation

`dsh-vet-visit` is a DeepSeek Harness plugin maintained by developer uckkk. It is a memory-type plugin implemented in pure Node.js. Without requiring network access, it directly returns screening recommendations for common pet illnesses and deworming regimens based on input parameters, addressing the pain point of agents relying on external web searches in specific domains. Installation requires an environment with dependencies such as `@deepseek-ai/cordis`. It is suitable for building agents with vertical-domain knowledge capabilities and is currently licensed under MIT.