* feat: support per-model overrides in llama.cpp load()
Extend the `load()` method in the llama.cpp extension to accept optional
`overrideSettings`, allowing fine-grained per-model configuration.
This enables users to override provider-level settings such as `ctx_size`,
`chat_template`, `n_gpu_layers`, etc., when loading a specific model.
Fixes: #5818 (Feature Request - Jan v0.6.6)
Use cases enabled:
- Different context sizes per model (e.g., 4K vs 32K)
- Model-specific chat templates (ChatML, Alpaca, etc.)
- Performance tuning (threads, GPU layers)
- Better memory management per deployment
Maintains full backward compatibility with existing provider config.
* swap overrideSettings and isEmbedding argument
81d6ed3785