INPUT_VALUE overwritten in _process_input_data leading to loss of multi-message context

[rite7sh]

Summary

SpanAttributes.INPUT_VALUE is overwritten multiple times in _process_input_data, resulting in loss of context for multi-message inputs.

In the current implementation, the final assignment reduces the input to only the first message, which breaks trace correctness for conversational inputs.

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Affected Code

In _span_io_handler.py:

if eval_input:
    eval_input_str = " \n ".join(map(str, eval_input))
    span.set_attribute(SpanAttributes.INPUT_VALUE, eval_input_str)

if eval_input and len(eval_input) > 0:
    span.set_attribute(SpanAttributes.INPUT_VALUE, eval_input[0])