When streaming, the LLM adapter needs to know which tools require
approval so it can emit ApprovalRequestMessage instead of ToolCallMessage.
Client-side tools were being passed to the agent but not included in
the requires_approval_tools list passed to the streaming interface.
This caused the streaming interface to emit tool_call_message for
client tools, but the stop_reason was still requires_approval,
resulting in empty approvals arrays on the client side.
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Co-authored-by: Letta <noreply@letta.com>
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