WinRacing Ultimate Analysis Center — Knife 4 Historical Engine

Scope completed
- Historical race-date selector starts at 2025-10-01.
- Reads authoritative dates from racing_date_2025_2026.
- Merges available dates from wr_chairman_production_score_v44 and Chairman JSON cache.
- Cache-first loading remains unchanged.
- Missing cache automatically falls back to Chairman Integration.
- Direct read-only historical production-table fallback added.
- Successful historical payload is saved as Chairman/cache/chairman_YYYY-MM-DD.json.
- No racing_results access.
- No DB INSERT / UPDATE / DELETE.
- No schema change and no live-weight mutation.

Usage
Open:
http://localhost/winRacing/analysis.php

Choose any available race date from 01/Oct/2025 onward and press:
Build Historical Analysis

Remaining final knife
- Historical result comparison / hit-rate backtest / final acceptance audit.