Session approval respond

`ToolApprovalConfig.REQUIRES_APPROVAL`, typically configured on
the agent in the dashboard.

import asyncio

from vectorshift import ToolApprovalConfig
from vectorshift.agent import Agent, AgentType, LLMInfo, MemoryConfig
from vectorshift.agent.tool import ToolInput, ToolInputType
from vectorshift.agent.tools import ExaAiTool
from vectorshift.events import SessionEventType

async def main() -> None:
    search = ExaAiTool(
        tool_name="exa_ai_search",
        query=ToolInput(type=ToolInputType.DYNAMIC, description="Search query"),
        num_results=ToolInput(
            type=ToolInputType.STATIC, description="Number of results to return", value=5
        ),
        approval_config=ToolApprovalConfig.REQUIRES_APPROVAL,
    )

    agent = Agent.new(
        name="Approval demo",
        type=AgentType.CONVERSATIONAL,
        llm_info=LLMInfo(provider="openai", model_id="gpt-4o"),
        tools=[search],
        instructions="You help research topics; always ask to search the web.",
        memory_config=MemoryConfig(enable_session_memory=True),
    )
    print(f"Created agent: {agent.name} (id={agent.id})")

    try:
        async with await agent.create_session() as session:
            print(f"Session: {session.session_id}")
            await session.send(
                "Find the latest news on quantum computing. Use the EXA AI search tool to search the web."
            )

            async for event in session.listen():
                if event.type == SessionEventType.APPROVAL_REQUEST:
                    tool = event.data.get("tool_name") or event.data.get("tool_id")
                    print(f"\n[approval] tool={tool!r} — auto-approving")
                    await session.respond(event, approved=True)
                    # Or, with extra field values the agent requested:
                    # await session.respond_approval(
                    #     event, approved=True, confirm={"num_results": 3}
                    # )
                    continue

                if event.type == SessionEventType.TOOL_RESULT:
                    print(f"[Tool Result] {event.data.get('result', '')}")
                    continue

                if event.type == SessionEventType.TOOL_CALL:
                    print(
                        f"[Tool Call] {event.tool_name} - {event.data.get('status', '')}"
                    )
                    print(f"[Tool Call Data] {event.data}")
                    continue

                if event.delta:
                    print(event.delta, end="", flush=True)

                if event.is_complete:
                    print("\n(turn complete)")
                    break

    finally:
        agent.delete()
        print("Deleted agent.")

if __name__ == "__main__":
    asyncio.run(main())