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Feature Request Description

Description

Add first-class support in lightrag/llm/ollama.py for Ollama "cloud" models so the library can transparently call either local Ollama instances or Ollama’s cloud service. Cloud models are identified by names that include -cloud or :cloud (e.g. gpt-oss:120b-cloud). When a cloud model is detected the code should:

• default the request host to https://ollama.com when no explicit host is provided
• accept an API key provided through kwargs (api_key) or fall back to the OLLAMA_API_KEY environment variable

Why

Ollama added cloud-hosted models that run on ollama.com. Users should be able to keep using the same client code whether the model runs locally or on the Ollama cloud, and the SDK should choose the appropriate host and authentication automatically.

Additional Context

No response