* fix(hosted_vllm): normalize custom tools for chat completions
Convert custom tool definitions into OpenAI function tools before forwarding hosted_vllm chat requests to avoid provider-side validation failures. Add a regression test and include a local curl verification screenshot.
Made-with: Cursor
* Fix black issue
* Fix hosted vllm custom tool schema fallback
* fix black
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Co-authored-by: Cursor Agent <cursoragent@cursor.com>
