feat(sambanova): update model YAMLs [bot]

[hganwani-droid]

Auto-generated by poc-agent for provider sambanova.

---

Note

Low Risk
Low risk metadata update to a single provider model config; may affect validation/routing by changing advertised context window and supported tool selection.

Overview
Updates the SambaNova Qwen3-235B model YAML to advertise the tool_choice capability.

Adjusts declared limits by reducing context_window to 64000 and adding max_tokens: 4096 alongside max_output_tokens.

^{Written by Cursor Bugbot for commit c1e9188. This will update automatically on new commits. Configure here.}