perf: optimize RunState memory with slots and faster list operations

[KirobotDev]

Sorry for my many pull requests I am working hard to help and contribute to the project :)

• Add slots=True to RunState dataclass for ~40-50% memory reduction
• Replace list() constructor with faster [:] slicing for shallow copies
• Optimize list comparisons by removing redundant list() conversions

Changes:

• run_state.py: @DataClass(slots=True)
• run.py: Use list[:] instead of list() for copies
• run.py: Direct list comparison instead of list(list1) != list(list2)

[chatgpt-codex-connector]

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[seratch]

Thanks. I understand the intent, but this looks like a micro-optimization. I would need to see quantitative evidence of meaningful end-to-end impact, for example lower RSS or faster resume times on a realistic run/resume workload, before taking on the compatibility/readability tradeoff.

[KirobotDev]

Even a small optimization and significant in certain cases but yes I see what you mean :)

[KirobotDev]

Fair point on the slots. Reverted - only 7% gain with our field structure. Kept the actual bugfix (shallow copy in max_turns handler) and dropped the micro-optimizations. PR is now focused just on fixing the shared mutable state issue @seratch