Introduce irisrun for automatic port management in distributed examples#309

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copilot/introduce-irisrun-example

Commits on Dec 19, 2025

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Implement irisrun CLI tool and port load_bench.py example

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Restructure irisrun as standalone CLI tool to avoid import issues

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Update load_bench README with irisrun usage instructions

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Fix code review issues: move SO_REUSEADDR before bind and add UTF-8 encoding

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Fix variable shadowing and add clarifying comments for irisrun mode

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Fix security issue: bind to localhost instead of all interfaces in _find_free_port

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