agentson e711d6702a fix: deduplicate missing-key warnings and normalize match_details ...

Addresses second round of PR #102 review:
- _warn_missing_key(): logs each missing key only once per engine instance
  to prevent log spam in high-frequency trading loops
- _build_match_details(): uses _safe_float() normalized values instead of
  raw market_data to ensure consistent float types in logging/analysis
- Test: verify warning fires exactly once across repeated calls
- Test: verify match_details contains normalized float values

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-02-08 20:41:20 +09:00

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