Changes to Push Samples

removed the request property samples/items/answer

removed the request property samples/items/completion

removed the request property samples/items/error

removed the request property samples/items/example_id

removed the request property samples/items/info

removed the request property samples/items/is_completed

removed the request property samples/items/is_truncated

removed the request property samples/items/latency_ms

removed the request property samples/items/metrics

removed the request property samples/items/num_steps

removed the request property samples/items/prompt

removed the request property samples/items/reward

removed the request property samples/items/rollout_number

removed the request property samples/items/stop_condition

removed the request property samples/items/timing

removed the request property samples/items/token_usage

removed the request property samples/items/tool_defs

removed the request property samples/items/total_time

removed the request property samples/items/trajectory

endpoint added