feat: option to skip verification

[macandro96]

Summary

Adds a response API agent option to skip resources-server verification during /run.

When skip_verification=true, agents return a synthetic verify response using skip_verification_reward and mark it with verification_skipped=true. Top-level config values are propagated to response API agents unless the agent explicitly sets its own values.

Changes

• Add skip_verification and skip_verification_reward to base response API agent config.
• Add skipped-verification response payload helper.
• Wire skip behavior into simple_agent and tool_simulation_agent.
• Add global config propagation for top-level skip-verification defaults.
• Add tests for config defaults, payload construction, and agent /run behavior.

Cherry pick from here

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[bxyu-nvidia]

i like the intent of this call_verify_or_skip util, but imo it is more intuitive to have smth super obvious in the /run code like:

        verify_request = SimpleAgentVerifyRequest.model_validate(body.model_dump() | {"response": model_response_json})

        if self.config.skip_verification:
            verify_response = await self.server_client.post(
                server_name=self.config.resources_server.name,
                url_path="/verify",
                json=verify_request.model_dump(),
                cookies=cookies,
            )
            await raise_for_status(verify_response)
            result = await get_response_json(verify_response)
        else:
            result = body.model_dump() | {
                "response": response_payload,
                "reward": 0,
                "verification_skipped": True,
            }

that way when our users build similar things everything they need is right in front of them, especially if they need to customize

[macandro96]

Should be addressed in 629c433