Fix StableHLO DSL export for constants and reductions#664
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Rebind HLO generator sample inputs to the tracing context so tensor-bound forward passes emit real StableHLO ops. Preserve symbolic DAG constant values and lower them as embedded constants instead of function arguments. Also infer reduction output shapes so reduced dimensions are dropped before downstream shape ops. Closes #663
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Rebind HLO generator sample inputs to the tracing context so tensor-bound forward passes emit real StableHLO ops. Preserve symbolic DAG constant values and lower them as embedded constants instead of function arguments. Also infer reduction output shapes so reduced dimensions are dropped before downstream shape ops.
Closes #663