Deduplicate Strategy research state losslessly

[FluffyAIcode]

Summary

• intern repeated statements, evidence, frontiers, and hypotheses once in text_by_id
• replace duplicate copies with exact references while preserving every unique semantic unit
• keep the 8192-token hard admission limit without truncation or summary

Test plan

• targeted AutoResearch tests: 44 passed
• verify duplicate exact text appears once and all refs resolve to the original

The uncommitted candidate.py file is active runtime state and is excluded.

Made with Cursor

[cursor]

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