Feature/Ollama Cloud

[HenryHengZJ]

[gemini-code-assist]

Summary of Changes

Hello @HenryHengZJ, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the platform's capability to integrate with Ollama Cloud services. It introduces a dedicated mechanism for handling Ollama API keys, allowing users to securely authenticate their connections. By integrating this new credential type into the ChatOllama model, the system can now facilitate authorized and secure communication with hosted Ollama models, expanding the range of accessible language models.

Highlights

• New Ollama API Credential: A new credential type, OllamaApi, has been introduced to securely store and manage Ollama API keys within the system.
• Ollama Chat Model Integration: The existing ChatOllama chat model has been updated to support connecting via the newly added OllamaApi credential, enabling authenticated interactions with Ollama services.
• API Key Authentication: The ChatOllama model now includes logic to retrieve the Ollama API key from the provided credentials and automatically add it as an Authorization header (Bearer token) to outgoing API requests, ensuring secure access to Ollama Cloud.

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Code Review

This pull request adds support for Ollama Cloud by introducing a new credential for API key authentication. The implementation is mostly correct, but I've found a critical issue with how the authentication headers are constructed, which would prevent it from working. Additionally, I've suggested some improvements to the new credential definition to enhance user experience by providing clear descriptions.