Model link update and hash fix

[theUpsider]

Description

close #77

• Made sha265 calculations use stable hordes own module.
• added original supported models (https://raw.githubusercontent.com/Haidra-Org/AI-Horde-image-model-reference/main/stable_diffusion.json) after discussion with their lead programmer on discord
• minor: fixed session key change after ui api key change When I use the new dreamshaper model from civit ai as specified in the model json, everything works fine. (https://civitai.com/api/download/models/78164?type=Model&format=SafeTensor&size=full&fp=fp16)

Type of changes

• [X] Bugfix
• [ ] Feature
• [ ] Refactoring
• [X] Optimization
• [ ] Documentation
• [ ] CI/CD
• [ ] Other

Please check the following items before submitting your pull request

• [X] I've checked that this isn't a duplicate pull request.
• [X] I've tested my changes with the latest SD-Webui version.
• [X] I've format my code with black: black .
• [X] I've lint my code with flake8: flake8 . Note: there are changes which cant be linted that were in the code even before my PR.
• [X] I've read the Contribution Guidelines
• [X] I've read the Code of Conduct

[theUpsider]

I did not cause the linting problem. This is some old code.