changed: auth ollama connection

[Haunui]

Pull Request Checklist

• Target branch: Pull requests should target the dev branch.
• Description: Briefly describe the changes in this pull request.
• Changelog: Ensure a changelog entry following the format of Keep a Changelog is added at the bottom of the PR description.
• Documentation: Have you updated relevant documentation Open WebUI Docs, or other documentation sources?
• Dependencies: Are there any new dependencies? Have you updated the dependency versions in the documentation?
• Testing: Have you written and run sufficient tests for the changes?
• Code Review: Have you self-reviewed your code and addressed any coding standard issues?

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Description

Add support for ollama connection that require a token access. The token can be set with the environment variable OLLAMA_AUTH_KEY or in the connection settings.

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Changelog Entry

Added

• Optional environment variables OLLAMA_AUTH_KEY and OLLAMA_AUTH_KEYS to set access token
• Option to set access token in connections settings

Fixed

• In ollama router, improve ollama response checking for get_ollama_versions(...) (route /api/version) and get_all_models() methods to avoid errors

Changed

• Use token access for ollama connection

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Additional Information

Issue : #2305

[timoa]

If you use another solution like Cloudflare Zero Trust to protect Ollama from outside (in a private subnet in AWS for ex.), you need to add two HTTP headers (CF-Access-Client-Id & CF-Access-Client-Secret). Is there a way to add multiple headers instead of static? Sorry if it's too late for this PR. I'm pretty sure that it will be useful for multiple authentication. Cheers!

[justinh-rahb]

Hello @Haunui! I appreciate and support the work you've contributed here. We've had 2 major releases in the last two weeks, I just wanted to check in to see if you're still willing to get this PR brought up to current dev branch base and finish it. If it's easier to close and open a new one, that's ok too.

[Kavan72]

I can help on this PR if you want.
cc. @Haunui @justinh-rahb

[Haunui]

@timoa I think thats a good idea. But I don't have the time and ressources to work on this features.

[Haunui]

Hello @justinh-rahb, sorry for the late answer.
The PR is ready and can now be pushed to the current dev branch.