refactor(oi): improve data extraction and consolidate documentation

- Fix MQL5 API usage in EA to use correct CopyRates and POSITION_TYPE enums
- Refactor scraper data extraction to use drop_duplicates for unique strikes
- Consolidate Windows setup guide into main README
- Add virtual environment batch files for easier setup and execution
- Simplify run_scraper.bat to focus on core execution
- Normalize lot calculation to use SymbolInfo.LotsStep()

oi_scraper/run_with_venv.bat

@@ -0,0 +1,21 @@
+@echo off
+REM ==========================================
+REM CME OI Scraper - Manual Run with Virtual Environment
+REM ==========================================
+
+REM Navigate to script directory
+cd /d %~dp0
+
+echo ==========================================
+echo CME OI Scraper - Manual Run
+echo ==========================================
+
+REM Activate virtual environment
+call venv\Scripts\activate.bat
+
+REM Run Python scraper
+python main.py
+
+echo.
+echo Scraper completed. Check oi_data.csv for results.
+timeout /t 5